@kactius i think that,s happening cuz the pi3 does not support opengl
i have the old halflife port on my pi3 so i cant test it on that since i have it working fine.

and right now im working with my pi4

Opposing Force start but I'am alone in the training boot camp. Seems like some scripts are broken, the ship that should crash during intro doesn't crash and fly to infinty and beyond.

Is this a new bug, or is it a known issue that has existed since the beginning ? Can it be fixed ?

It was a pain to start Blue Shift with unlocked maps. The linked patch doesn't exist anymore, and others doesn't work. The only solution is to find pre-patched maps pack.

With this Blue Shift can start :
https://www.moddb.com/games/half-life-blue-shift/downloads/blue-shift-unlocked-game-dlls-and-patched-maps

@karl0001 I got the solution myself. The issue was the xpad driver installed by Retropie. Once I uninstalled it everything works. Have a look here: https://github.com/Fredrum/chiaki/issues/14