3 files changed, 78 insertions, 3 deletions

diff --git a/libs/basic_games/epic_utils.py b/libs/basic_games/epic_utils.py
index 94ae6a9..afdccd5 100644
--- a/libs/basic_games/epic_utils.py
+++ b/libs/basic_games/epic_utils.py
@@ -87,6 +87,21 @@ def find_legendary_games(
 
 
 def find_heroic_games(errors: ErrorList | None = None):
+    # Linux: Heroic stores config in ~/.config/heroic/ (or Flatpak equivalent).
+    for candidate in (
+        Path.home() / ".config" / "heroic" / "legendaryConfig",
+        Path.home()
+        / ".var"
+        / "app"
+        / "com.heroicgameslauncher.hgl"
+        / "config"
+        / "heroic"
+        / "legendaryConfig",
+    ):
+        if candidate.is_dir():
+            return find_legendary_games(str(candidate), errors)
+
+    # Windows fallback.
     return find_legendary_games(
         os.path.expandvars(r"%AppData%\heroic\legendaryConfig"), errors
     )
diff --git a/libs/basic_games/gog_utils.py b/libs/basic_games/gog_utils.py
index e5e6d24..de66ec2 100644
--- a/libs/basic_games/gog_utils.py
+++ b/libs/basic_games/gog_utils.py
@@ -1,12 +1,50 @@
 # Code adapted from EzioTheDeadPoet / erri120:
 #     https://github.com/ModOrganizer2/modorganizer-basic_games/pull/5
 
+from __future__ import annotations
+
+import json
+import sys
 import winreg
 from pathlib import Path
 
 
+def _find_heroic_gog_games() -> dict[str, Path]:
+    """Detect GOG games installed via Heroic Launcher on Linux."""
+    games: dict[str, Path] = {}
+
+    for candidate in (
+        Path.home() / ".config" / "heroic" / "gog_store" / "installed.json",
+        Path.home()
+        / ".var"
+        / "app"
+        / "com.heroicgameslauncher.hgl"
+        / "config"
+        / "heroic"
+        / "gog_store"
+        / "installed.json",
+    ):
+        if not candidate.is_file():
+            continue
+        try:
+            with open(candidate, encoding="utf-8") as f:
+                data = json.load(f)
+            for game in data.get("installed", []):
+                app_name = game.get("appName", "")
+                install_path = game.get("install_path") or game.get("installPath", "")
+                if app_name and install_path:
+                    games[str(app_name)] = Path(install_path)
+        except (json.JSONDecodeError, OSError) as e:
+            print(
+                f'Unable to parse Heroic GOG installed games from "{candidate}": {e}',
+                file=sys.stderr,
+            )
+
+    return games
+
+
 def find_games() -> dict[str, Path]:
-    # List the game IDs from the registry:
+    # List the game IDs from the registry (Windows):
     game_ids: list[str] = []
     try:
         with winreg.OpenKey(
@@ -18,7 +56,8 @@ def find_games() -> dict[str, Path]:
                 if game_key.isdigit():
                     game_ids.append(game_key)
     except FileNotFoundError:
-        return {}
+        # Windows registry not available; try Heroic GOG on Linux.
+        return _find_heroic_gog_games()
 
     # For each game, query the path:
     games: dict[str, Path] = {}
diff --git a/libs/basic_games/steam_utils.py b/libs/basic_games/steam_utils.py
index d1d4a06..a3daeaf 100644
--- a/libs/basic_games/steam_utils.py
+++ b/libs/basic_games/steam_utils.py
@@ -148,7 +148,28 @@ def find_steam_path() -> Path | None:
             value = winreg.QueryValueEx(key, "SteamExe")
             return Path(value[0].replace("/", "\\")).parent
     except FileNotFoundError:
-        return None
+        pass
+
+    # Linux: check common Steam install locations.
+    for candidate in (
+        Path.home() / ".local" / "share" / "Steam",
+        Path.home() / ".steam" / "steam",
+        Path.home()
+        / ".var"
+        / "app"
+        / "com.valvesoftware.Steam"
+        / ".local"
+        / "share"
+        / "Steam",
+        Path.home() / "snap" / "steam" / "common" / ".local" / "share" / "Steam",
+    ):
+        if (
+            candidate.is_dir()
+            and candidate.joinpath("steamapps", "libraryfolders.vdf").exists()
+        ):
+            return candidate
+
+    return None
 
 
 def find_games() -> dict[str, Path]: