diff --git a/src/protontricks/cli/main.py b/src/protontricks/cli/main.py
index c77d287..236c2a9 100755
--- a/src/protontricks/cli/main.py
+++ b/src/protontricks/cli/main.py
@@ -17,8 +17,7 @@ from ..flatpak import (FLATPAK_BWRAP_COMPATIBLE_VERSION,
                        get_running_flatpak_version)
 from ..gui import (prompt_filesystem_access, select_steam_app_with_gui,
                    select_steam_installation)
-from ..steam import (find_legacy_steam_runtime_path, find_proton_app,
-                     find_steam_installations, get_steam_apps,
+from ..steam import (find_proton_app, find_steam_installations, get_steam_apps,
                      get_steam_lib_paths)
 from ..util import run_command
 from ..winetricks import get_winetricks_path
@@ -67,8 +66,7 @@ def main(args=None, steam_path=None, steam_root=None):
             "WINE: path to a custom 'wine' executable\n"
             "WINESERVER: path to a custom 'wineserver' executable\n"
             "STEAM_RUNTIME: 1 = enable Steam Runtime, 0 = disable Steam "
-            "Runtime, valid path = custom Steam Runtime path, "
-            "empty = enable automatically (default)\n"
+            "Runtime, empty = enable automatically (default)\n"
             "PROTONTRICKS_GUI: GUI provider to use, accepts either 'yad' "
             "or 'zenity'"
         ),
@@ -204,17 +202,9 @@ def main(args=None, steam_path=None, steam_root=None):
         if not steam_path:
             exit_("No Steam installation was selected.")
 
-    # 2. Find the pre-installed legacy Steam Runtime if enabled
-    legacy_steam_runtime_path = None
-    use_steam_runtime = True
-
+    # 2. Use Steam Runtime if enabled
     if os.environ.get("STEAM_RUNTIME", "") != "0" and not args.no_runtime:
-        legacy_steam_runtime_path = find_legacy_steam_runtime_path(
-            steam_root=steam_root
-        )
-
-        if not legacy_steam_runtime_path:
-            exit_("Steam Runtime was enabled but couldn't be found!")
+        use_steam_runtime = True
     else:
         use_steam_runtime = False
         logger.info("Steam Runtime disabled.")
@@ -281,7 +271,6 @@ def main(args=None, steam_path=None, steam_root=None):
             proton_app=proton_app,
             steam_app=steam_app,
             use_steam_runtime=use_steam_runtime,
-            legacy_steam_runtime_path=legacy_steam_runtime_path,
             command=[str(winetricks_path), "--gui"],
             use_bwrap=use_bwrap,
             start_wineserver=start_background_wineserver
@@ -361,7 +350,6 @@ def main(args=None, steam_path=None, steam_root=None):
             proton_app=proton_app,
             steam_app=steam_app,
             use_steam_runtime=use_steam_runtime,
-            legacy_steam_runtime_path=legacy_steam_runtime_path,
             use_bwrap=use_bwrap,
             start_wineserver=start_background_wineserver,
             command=[str(winetricks_path)] + args.winetricks_command
@@ -373,7 +361,6 @@ def main(args=None, steam_path=None, steam_root=None):
             steam_app=steam_app,
             command=args.command,
             use_steam_runtime=use_steam_runtime,
-            legacy_steam_runtime_path=legacy_steam_runtime_path,
             use_bwrap=use_bwrap,
             start_wineserver=start_background_wineserver,
             # Pass the command directly into the shell *without*
diff --git a/src/protontricks/data/scripts/bwrap_launcher.sh b/src/protontricks/data/scripts/bwrap_launcher.sh
index b5552e1..b11bc99 100644
--- a/src/protontricks/data/scripts/bwrap_launcher.sh
+++ b/src/protontricks/data/scripts/bwrap_launcher.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Helper script
 set -o errexit
 
@@ -80,6 +80,8 @@ done
 log_info "Following directories will be mounted inside container: ${mount_dirs[*]}"
 log_info "Using temporary directory: $PROTONTRICKS_TEMP_PATH"
 
-exec "$STEAM_RUNTIME_PATH"/run --share-pid --launcher \
+exec steam-run "$STEAM_RUNTIME_PATH"/pressure-vessel/bin/pressure-vessel-wrap \
+--variable-dir="${PRESSURE_VESSEL_VARIABLE_DIR:-$STEAM_RUNTIME_PATH/var}" \
+--share-pid --launcher \
 "${mount_params[@]}" -- \
 --bus-name="com.github.Matoking.protontricks.App${STEAM_APPID}_${PROTONTRICKS_SESSION_ID}"
diff --git a/src/protontricks/data/scripts/wine_launch.sh b/src/protontricks/data/scripts/wine_launch.sh
index 1f8a432..2d82f2b 100644
--- a/src/protontricks/data/scripts/wine_launch.sh
+++ b/src/protontricks/data/scripts/wine_launch.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env -S steam-run bash
 # Helper script created by Protontricks to run Wine binaries using Steam Runtime
 set -o errexit
 
@@ -158,8 +158,8 @@ if [[ -n "$PROTONTRICKS_INSIDE_STEAM_RUNTIME"
         export LD_LIBRARY_PATH="$LD_LIBRARY_PATH":"$PROTON_LD_LIBRARY_PATH"
         log_info "Appending to LD_LIBRARY_PATH: $PROTON_LD_LIBRARY_PATH"
     elif [[ "$PROTONTRICKS_STEAM_RUNTIME" = "legacy" ]]; then
-        export LD_LIBRARY_PATH="$PROTON_LD_LIBRARY_PATH"
-        log_info "LD_LIBRARY_PATH set to $LD_LIBRARY_PATH"
+        export LD_LIBRARY_PATH="$PROTON_LD_LIBRARY_PATH":"$LD_LIBRARY_PATH"
+        log_info "Inserting to head of LD_LIBRARY_PATH: $PROTON_LD_LIBRARY_PATH"
     fi
     exec "$PROTON_DIST_PATH"/bin/@@name@@ "$@" || :
 elif [[ "$PROTONTRICKS_STEAM_RUNTIME" = "bwrap" ]]; then
diff --git a/src/protontricks/data/scripts/wineserver_keepalive.sh b/src/protontricks/data/scripts/wineserver_keepalive.sh
index 8168dae..559de33 100644
--- a/src/protontricks/data/scripts/wineserver_keepalive.sh
+++ b/src/protontricks/data/scripts/wineserver_keepalive.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # A simple keepalive script that will ensure a wineserver process is kept alive
 # for the duration of the Protontricks session.
 # This is accomplished by launching a simple Windows batch script that will
diff --git a/src/protontricks/steam.py b/src/protontricks/steam.py
index c39b51d..79de098 100644
--- a/src/protontricks/steam.py
+++ b/src/protontricks/steam.py
@@ -14,9 +14,8 @@ from .util import lower_dict
 
 __all__ = (
     "COMMON_STEAM_DIRS", "SteamApp", "find_steam_installations",
-    "find_steam_path", "find_legacy_steam_runtime_path",
-    "iter_appinfo_sections", "get_appinfo_sections", "get_tool_appid",
-    "find_steam_compat_tool_app", "find_appid_proton_prefix",
+    "find_steam_path", "iter_appinfo_sections", "get_appinfo_sections",
+    "get_tool_appid", "find_steam_compat_tool_app", "find_appid_proton_prefix",
     "find_proton_app", "get_steam_lib_paths", "get_compat_tool_dirs",
     "get_custom_compat_tool_installations_in_dir",
     "get_custom_compat_tool_installations", "find_current_steamid3",
@@ -393,37 +392,6 @@ def find_steam_path():
         return None, None
 
 
-def find_legacy_steam_runtime_path(steam_root):
-    """
-    Find the legacy Steam Runtime either using the STEAM_RUNTIME env or
-    steam_root
-    """
-    env_steam_runtime = os.environ.get("STEAM_RUNTIME", "")
-
-    if env_steam_runtime == "0":
-        # User has disabled Steam Runtime
-        logger.info("STEAM_RUNTIME is 0. Disabling Steam Runtime.")
-        return None
-    elif env_steam_runtime and Path(env_steam_runtime).is_dir():
-        # User has a custom Steam Runtime
-        logger.info(
-            "Using custom Steam Runtime at %s", env_steam_runtime)
-        return Path(env_steam_runtime)
-    elif env_steam_runtime in ["1", ""]:
-        # User has enabled Steam Runtime or doesn't have STEAM_RUNTIME set;
-        # default to enabled Steam Runtime in either case
-        steam_runtime_path = steam_root / "ubuntu12_32" / "steam-runtime"
-
-        logger.info(
-            "Using default Steam Runtime at %s", str(steam_runtime_path))
-        return steam_runtime_path
-
-    logger.error(
-        "Path in STEAM_RUNTIME doesn't point to a valid Steam Runtime!")
-
-    return None
-
-
 APPINFO_STRUCT_HEADER = "<4sL"
 APPINFO_V27_STRUCT_SECTION = "<LLLLQ20sL"
 APPINFO_V28_STRUCT_SECTION = "<LLLLQ20sL20s"
diff --git a/src/protontricks/util.py b/src/protontricks/util.py
index 7e95af5..7dc9a29 100644
--- a/src/protontricks/util.py
+++ b/src/protontricks/util.py
@@ -8,14 +8,14 @@ import shutil
 import tempfile
 import re
 from pathlib import Path
-from subprocess import PIPE, check_output, run, Popen, DEVNULL
+from subprocess import PIPE, run, Popen, DEVNULL
 
 import pkg_resources
 
 __all__ = (
     "SUPPORTED_STEAM_RUNTIMES", "lower_dict",
-    "get_legacy_runtime_library_paths", "get_host_library_paths",
-    "RUNTIME_ROOT_GLOB_PATTERNS", "get_runtime_library_paths",
+    "get_host_library_paths", "RUNTIME_ROOT_GLOB_PATTERNS",
+    "get_runtime_library_paths",
     "WINE_SCRIPT_TEMPLATE", "create_wine_bin_dir", "run_command"
 )
 
@@ -43,24 +43,6 @@ def lower_dict(d):
     return {k.lower(): _lower_value(v) for k, v in d.items()}
 
 
-def get_legacy_runtime_library_paths(legacy_steam_runtime_path, proton_app):
-    """
-    Get LD_LIBRARY_PATH value to use when running a command using Steam Runtime
-    """
-    steam_runtime_paths = check_output([
-        str(legacy_steam_runtime_path / "run.sh"),
-        "--print-steam-runtime-library-paths"
-    ])
-    steam_runtime_paths = str(steam_runtime_paths, "utf-8")
-    # Add Proton installation directory first into LD_LIBRARY_PATH
-    # so that libwine.so.1 is picked up correctly (see issue #3)
-    return "".join([
-        str(proton_app.proton_dist_path / "lib"), os.pathsep,
-        str(proton_app.proton_dist_path / "lib64"), os.pathsep,
-        steam_runtime_paths
-    ])
-
-
 def get_host_library_paths():
     """
     Get host library paths to use when creating the LD_LIBRARY_PATH environment
@@ -72,7 +54,7 @@ def get_host_library_paths():
     # Since that command is unavailable with newer Steam Runtime releases,
     # do it ourselves here.
     result = run(
-        ["/sbin/ldconfig", "-XNv"],
+        ["steam-run", "ldconfig", "-XNv"],
         check=True, stdout=PIPE, stderr=PIPE
     )
     lines = result.stdout.decode("utf-8").split("\n")
@@ -90,7 +72,7 @@ RUNTIME_ROOT_GLOB_PATTERNS = (
 )
 
 
-def get_runtime_library_paths(proton_app, use_bwrap=True):
+def get_runtime_library_paths(proton_app, proton_app_only=True):
     """
     Get LD_LIBRARY_PATH value to use when running a command using Steam Runtime
     """
@@ -111,7 +93,7 @@ def get_runtime_library_paths(proton_app, use_bwrap=True):
             f"Could not find Steam Runtime runtime root for {runtime_app.name}"
         )
 
-    if use_bwrap:
+    if proton_app_only:
         return "".join([
             str(proton_app.proton_dist_path / "lib"), os.pathsep,
             str(proton_app.proton_dist_path / "lib64"), os.pathsep
@@ -313,7 +295,7 @@ def run_command(
             wine_environ["STEAM_RUNTIME_PATH"] = \
                 str(proton_app.required_tool_app.install_path)
             wine_environ["PROTON_LD_LIBRARY_PATH"] = \
-                get_runtime_library_paths(proton_app, use_bwrap=use_bwrap)
+                get_runtime_library_paths(proton_app, proton_app_only=use_bwrap)
 
             runtime_name = proton_app.required_tool_app.name
             logger.info(
@@ -337,13 +319,9 @@ def run_command(
                     "Current Steam Runtime not recognized by Protontricks."
                 )
         else:
-            # Legacy Steam Runtime requires a different LD_LIBRARY_PATH
-            # that is produced by a script.
             wine_environ["PROTONTRICKS_STEAM_RUNTIME"] = "legacy"
             wine_environ["PROTON_LD_LIBRARY_PATH"] = \
-                get_legacy_runtime_library_paths(
-                    legacy_steam_runtime_path, proton_app
-                )
+                get_runtime_library_paths(proton_app, proton_app_only=True)
 
             # bwrap is not available, so ensure it is not launched even if the
             # user configured it so
@@ -353,7 +331,6 @@ def run_command(
     # configuring the environment and Wine before launching the underlying
     # Wine binaries.
     wine_bin_dir = create_wine_bin_dir(proton_app)
-    wine_environ["LEGACY_STEAM_RUNTIME_PATH"] = str(legacy_steam_runtime_path)
     wine_environ["PATH"] = os.pathsep.join(
         [str(wine_bin_dir), wine_environ["PATH"]]
     )
diff --git a/tests/cli/test_main.py b/tests/cli/test_main.py
index 0a35f8d..9b96629 100644
--- a/tests/cli/test_main.py
+++ b/tests/cli/test_main.py
@@ -121,15 +121,10 @@ class TestCLIRun:
         assert str(command.args[0]).endswith(".local/bin/winetricks")
         assert command.args[1] == "winecfg"
         assert command.env["PATH"].startswith(str(wine_bin_dir))
-        assert (
-            "fake_steam_runtime/lib64" in command.env["PROTON_LD_LIBRARY_PATH"]
-        )
         assert command.env["WINE"] == str(wine_bin_dir / "wine")
         assert command.env["WINELOADER"] == str(wine_bin_dir / "wine")
         assert command.env["WINESERVER"] == str(wine_bin_dir / "wineserver")
 
-        assert command.env["LEGACY_STEAM_RUNTIME_PATH"] == \
-            str(steam_runtime_dir / "steam-runtime")
         assert command.env["PROTONTRICKS_STEAM_RUNTIME"] == "legacy"
         assert "STEAM_RUNTIME_PATH" not in command.env
 
@@ -180,16 +175,14 @@ class TestCLIRun:
         assert command.env["PATH"].startswith(str(wine_bin_dir))
 
         # Compared to the traditional Steam Runtime, PROTON_LD_LIBRARY_PATH
-        # will be different
+        # will be the same (it would be different without steam-run.patch)
         proton_install_path = Path(proton_app.install_path)
         assert command.env["PROTON_LD_LIBRARY_PATH"] == "".join([
             str(proton_install_path / "dist" / "lib"), os.pathsep,
             str(proton_install_path / "dist" / "lib64"), os.pathsep
         ])
 
-        # Environment variables for both legacy and new Steam Runtime exist
-        assert command.env["LEGACY_STEAM_RUNTIME_PATH"] == \
-            str(steam_runtime_dir / "steam-runtime")
+        # Environment variable for new Steam Runtime exists
         assert command.env["STEAM_RUNTIME_PATH"] == \
             str(steam_runtime_soldier.install_path)
         assert command.env["PROTONTRICKS_STEAM_RUNTIME"] == "bwrap"
@@ -254,9 +247,7 @@ class TestCLIRun:
             str(runtime_root / "lib" / "x86_64-linux-gnu")
         ]))
 
-        # Environment variables for both legacy and new Steam Runtime exist
-        assert command.env["LEGACY_STEAM_RUNTIME_PATH"] == \
-            str(steam_runtime_dir / "steam-runtime")
+        # Environment variable for new Steam Runtime exists
         assert command.env["STEAM_RUNTIME_PATH"] == \
             str(steam_runtime_soldier.install_path)
         assert command.env["PROTONTRICKS_STEAM_RUNTIME"] == "legacy"
@@ -407,7 +398,6 @@ class TestCLIRun:
 
         # Also ensure log messages are included in the error message
         assert b"Found Steam directory at" in message
-        assert b"Using default Steam Runtime" in message
 
     def test_run_gui_provider_not_found(self, cli, home_dir, steam_app_factory):
         """
@@ -421,20 +411,6 @@ class TestCLIRun:
 
         assert "YAD or Zenity is not installed" in result
 
-    def test_run_steam_runtime_not_found(
-            self, cli, steam_dir, steam_app_factory):
-        """
-        Try performing a command with Steam Runtime enabled but no
-        available Steam Runtime installation
-        """
-        steam_app_factory(name="Fake game 1", appid=10)
-        result = cli(
-            ["10", "winecfg"], env={"STEAM_RUNTIME": "invalid/path"},
-            expect_returncode=1
-        )
-
-        assert "Steam Runtime was enabled but couldn't be found" in result
-
     def test_run_proton_not_found(self, cli, steam_dir, steam_app_factory):
         steam_app_factory(name="Fake game 1", appid=10)
         result = cli(["10", "winecfg"], expect_returncode=1)
diff --git a/tests/conftest.py b/tests/conftest.py
index 106e0d9..8236f3a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -169,7 +169,7 @@ def steam_runtime_dir(steam_dir):
     """
     (steam_dir.parent / "root" / "ubuntu12_32" / "steam-runtime").mkdir(parents=True)
     (steam_dir.parent / "root" / "ubuntu12_32" / "steam-runtime" / "run.sh").write_text(
-        "#!/bin/bash\n"
+        "#!/usr/bin/env -S steam-run bash\n"
         """if [ "$1" = "--print-steam-runtime-library-paths" ]; then\n"""
         "    echo 'fake_steam_runtime/lib:fake_steam_runtime/lib64'\n"
         "fi"
@@ -735,7 +735,7 @@ def xdg_user_dir_bin(home_dir):
     # Only mock PICTURES and DOWNLOAD; mocking everything isn't necessary
     # for the tests.
     (home_dir / ".local" / "bin" / "xdg-user-dir").write_text(
-        '#!/bin/bash\n'
+        '#!/usr/bin/env -S steam-run bash\n'
         'if [[ "$1" == "PICTURES" ]]; then\n'
         '    echo "$HOME/Pictures"\n'
         'elif [[ "$1" == "DOWNLOAD" ]]; then\n'
diff --git a/tests/test_flatpak.py b/tests/test_flatpak.py
index cb2b9bb..440b704 100644
--- a/tests/test_flatpak.py
+++ b/tests/test_flatpak.py
@@ -159,36 +159,6 @@ class TestGetInaccessiblePaths:
 
         assert len(inaccessible_paths) == 0
 
-    @pytest.mark.usefixtures("xdg_user_dir_bin")
-    def test_flatpak_xdg_user_dir(self, monkeypatch, tmp_path, home_dir):
-        """
-        Test that XDG filesystem permissions such as 'xdg-pictures' and
-        'xdg-download' are detected correctly
-        """
-        flatpak_info_path = tmp_path / "flatpak-info"
-
-        flatpak_info_path.write_text(
-            "[Application]\n"
-            "name=fake.flatpak.Protontricks\n"
-            "\n"
-            "[Instance]\n"
-            "flatpak-version=1.12.1\n"
-            "\n"
-            "[Context]\n"
-            "filesystems=xdg-pictures;"
-        )
-        monkeypatch.setattr(
-            "protontricks.flatpak.FLATPAK_INFO_PATH", str(flatpak_info_path)
-        )
-
-        inaccessible_paths = get_inaccessible_paths([
-            str(home_dir / "Pictures"),
-            str(home_dir / "Download")
-        ])
-
-        assert len(inaccessible_paths) == 1
-        assert str(inaccessible_paths[0]) == str(home_dir / "Download")
-
     def test_flatpak_unknown_permission(self, monkeypatch, tmp_path, caplog):
         """
         Test that unknown filesystem permissions are ignored
diff --git a/tests/test_util.py b/tests/test_util.py
index ec5f4f3..0b0a66c 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -98,44 +98,6 @@ class TestRunCommand:
         assert command.env["WINELOADER"] == "/fake/wine"
         assert command.env["WINESERVER"] == "/fake/wineserver"
 
-    def test_unknown_steam_runtime_detected(
-            self, home_dir, proton_factory, runtime_app_factory,
-            steam_app_factory, caplog):
-        """
-        Test that Protontricks will log a warning if it encounters a Steam
-        Runtime it does not recognize
-        """
-        steam_runtime_medic = runtime_app_factory(
-            name="Steam Linux Runtime - Medic",
-            appid=14242420,
-            runtime_dir_name="medic"
-        )
-        proton_app = proton_factory(
-            name="Proton 5.20", appid=100, compat_tool_name="proton_520",
-            is_default_proton=True, required_tool_app=steam_runtime_medic
-        )
-        steam_app = steam_app_factory(name="Fake game", appid=10)
-
-        run_command(
-            winetricks_path=Path("/usr/bin/winetricks"),
-            proton_app=proton_app,
-            steam_app=steam_app,
-            command=["echo", "nothing"],
-            shell=True,
-            use_steam_runtime=True
-        )
-
-        # Warning will be logged since Protontricks does not recognize
-        # Steam Runtime Medic and can't ensure it's being configured correctly
-        warning = next(
-            record for record in caplog.records
-            if record.levelname == "WARNING"
-            and "not recognized" in record.getMessage()
-        )
-        assert warning.getMessage() == \
-            "Current Steam Runtime not recognized by Protontricks."
-
-
 class TestLowerDict:
     def test_lower_nested_dict(self):
         """