


Works with Steam Flatpak after creating a symlink to StreamingAssets.
You can disregard my previous reports, as this should be easier to read, and after experimenting with other games, I understand the problem better now.
This game, along with at least a handful of other Unity-made games, have an issue on Flatpak where it's looking for files in the wrong directory. This causes these games to "lock up" at various loading screens. In this game, the first place this happens (to my knowledge) is Red City at the beginning of the game.
To fix this, you'll need to go to the game's main directory and create a symbolic link to the StreamingAssets folder.
Run the following two commands in a terminal:
cd "/var/home/$USER/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/DEMON GAZE EXTRA"
ln -s "DEMON GAZE EXTRA_Data/StreamingAssets" .

The game crashes to a black screen upon entering "Red City" from the world map. Launching the game from the terminal and reading the errors reveals that the game is looking for assets in an invalid directory.
Namely, the game is looking for StreamingAssets
within the main directory, but it's actually within the DEMON GAZE EXTRA_data
directory.
To fix the issue, create a symbolic link ("symlink") to the correct directory:
- Open a terminal and cd to
/steamapps/common/DEMON GAZE EXTRA
- Paste and run this command:
ln -s 'DEMON GAZE EXTRA_Data/StreamingAssets' .

Game runs perfectly with a simple symlink fix.
The game crashes to a black screen upon entering "Red City" from the world map. Launching the game from the terminal and reading the errors reveals that the game is looking for assets in an invalid directory.
Namely, the game is looking for StreamingAssets
within the main directory, but it's actually within the DEMON GAZE EXTRA_data
directory.
To fix the issue, create a symbolic link ("symlink") to the correct directory:
- Open a terminal and cd to
/steamapps/common/DEMON GAZE EXTRA
- Paste and run this command:
ln -s 'The Last Campfire_Data/StreamingAssets' .

Game freezes when entering first dungeon.
Game freezes (black screen) when entering the first dungeon "Red City" at the beginning of the game.
Tried Proton GE, same result. Tried older versions of Proton; either the game didn't run at all, or same problem mentioned here.
Opening video did not play with default proton 7.0-4 (only the audio played). No crashes or anything during the OP and game went back to normal after so it's not a significant issue. However switching to GE 7-29 let the full OP play w/ video, so switch to that in case any other videos show up. No other issues of note to report.