Serious Sam 2 - confirmed, working for single-player and usable for SDA. Been using it for 2 years. There are just 2 issues:
1) Timer not shown - screenshot of the stats after finishing level is required
2) Short cutscenes are not skipped even if you did so. They are very short anyway, so it shouldn't matter.
Everything like hud and things needed for verification are alright.
Postal 2 - I couldn't find anything in this game to produce demos, so I'd remove it from the list.
Return to Castle Wolfenstein - I should clarify this. Demo recording works in single-player too, but even the game itself is unable to playback, because it creates unsupported old extension. This should be ok for multi-player though.
Driver - Not usable for SDA since playback doesn't show Damage and Felony bars, speed and timer.
1) Timer not shown - screenshot of the stats after finishing level is required
2) Short cutscenes are not skipped even if you did so. They are very short anyway, so it shouldn't matter.
Everything like hud and things needed for verification are alright.
Postal 2 - I couldn't find anything in this game to produce demos, so I'd remove it from the list.
Return to Castle Wolfenstein - I should clarify this. Demo recording works in single-player too, but even the game itself is unable to playback, because it creates unsupported old extension. This should be ok for multi-player though.
Driver - Not usable for SDA since playback doesn't show Damage and Felony bars, speed and timer.