What is your favorite video game?

to whoever posted half-life, good job, but the topic does read VIDEO games, not COMPUTER games. <_< but i guess, here go my fav. COMPUTER games now:

Half-Life all 3 versions (Opposing Force, Blue Shift, Original)
Day of Defeat
Doom (1, 2, Final Doom, and 3 [yes, i've already played 3])
The Sims

B)

 

:chemist: Diablo II :chemist:

 

Resident Evil 0, and FF 8 and 9, and i hope that FF the Cyristal Cronicals comes out in North America for GC