This is a patch for the native Linux and Mac versions of Psychonauts released by the developer icculus on his website in the now-defunct bugtracker. As of March 2026, the file can alternatively still be downloaded from icculus's website per direct link: https://treefort.icculus.org/psychonauts/

The patch notes can be found here: https://treefort.icculus.org/psychonauts/README-Psychonauts-0.9.html

I have provided a copy of the Readme file as follows: Unlike what this changelog claims, it is not possible to procure a 0.9 version.

Changelog:

0.9:

• The Mac version will now migrate your savegames from the Transgaming version of Psychonauts on startup, if it sees the Transgaming savegames and doesn't see any from the native version of the game.

0.8:

• Fixed projected textures (like the films on the walls in Basic Braining).

0.7:

• Fixed bad particle rendering (fires, bugs, double-jump effect, etc) on some systems.
• Fixed missing character shadows.
• Fixed chalkboards on bunk beds not updating correctly.
• Several other rendering fixes.
• Other fixes.

0.6:

• Fixed screen being permanently blurry after using the bacon.
• Fixed health bar never changing.
• Fixed audio dropping out after playing for long enough.
• Other fixes.

0.5:

• Fixed missing music.
• Fixed flickering terrain textures.
• Fixed incorrectly rendered fire and other particle effects on some systems.
• Fixed uninitialized textures causing rendering artifacts.
• Fixed several crashes and other bugs.
• Fixed collected figments in HUD not fading away after a few moments.
• Restored Dracogen section to the credits.
• Other fixes.

0.4:

• Fixed conversations having long pauses between lines of dialog.
• Fixed occasional crash on loading screen.

0.3:

• Fixed several seemingly-random crashes. This build will hopefully be much more stable for you.
• Fixed several audio playback issues.
• Fixed spammy debug messages about an "unknown POV hat" when certain joysticks were plugged in.

0.2:

• Fixed several memory corruptions and uninitialized memory accesses. If you were getting lots of seemingly random crashes and other odd behavior with version 0.1, then version 0.2 will work much better for you.
• Added multisample ("FSAA") support. This is enabled by default, if your system supports it, to make the game look smoother. If your game is running too slowly now, you can turn this off by unchecking "FSAA" in the Display Options menu.
• Added joystick support.
• Fixed wrong pathname for DisplaySettings.ini (0.1 would create a file named "Psychonauts\\DisplaySettings.ini" instead of a file named "DisplaySettings.ini" in the Psychonauts directory). The game will notice this wrong file on startup, if it exists, and migrate it to the correct location.

0.1:

• Initial release, in Humble Indie Bundle #5 (and later, Steam).