If you you had to pick one what would it be. My personal choice is Red Alert 3. I know not a lot people have heard of this game but I found it to be pretty addictive.
Pong
Pac Man
Gallaga
RC Pro Am
Star Wars: KOTR series
Elder Scrolls: Skyrim and series
Fallout Series
Mass Effect Series
First person shooters: (especially when they're realistic) MOH, some COD, some Battlefield, Sniper Elite
EA Sports: NCAA Football, NFL, NHL, FIFA
But if you had to pick just one......
Probably EA sports NFL/Madden Football. I would say Elder Scrolls Skyrim.....which I have played start to finish about 3x........but I've played Madden franchises every yr steadily since they started to produce them.
-kid: pitfall or missle command.
-college: sonic or nhl hockey on sega.
-adult: mario kart.
That's commitment. Those games have been out for quite a while.