For me in no particular order:
- Halo
- Halo 2
- Half-Life
- Dark Forces 1
- Dark Forces 2: Jedi Knight
- F.E.A.R.
- Doom 2
- Wolfenstein
- Goldeneye
- Black tied with Timesplitters 2
Honorable mentions:
- Halo 3
- Return to Castle Wolfenstein
- Serious Sam
- Serious Sam 2
- Serious Sam 3
- Painkiller
- Crysis
- Crysis 2
- Bulletstorm
- Fallout: New Vegas
- Timesplitters
- Halo
- Halo 2
- Half-Life
- Dark Forces 1
- Dark Forces 2: Jedi Knight
- F.E.A.R.
- Doom 2
- Wolfenstein
- Goldeneye
- Black tied with Timesplitters 2
Honorable mentions:
- Halo 3
- Return to Castle Wolfenstein
- Serious Sam
- Serious Sam 2
- Serious Sam 3
- Painkiller
- Crysis
- Crysis 2
- Bulletstorm
- Fallout: New Vegas
- Timesplitters