Well at the op of the thread you said "FPS" so that's the figure I gave (10 hours), but as others are talking about other games, this is what I think:
Good RPG (Baldurs Gate, Neverwinter Nights) 30-40 hours if you bother with the smaller quests.
Platformer around 15-20 hours if lucky.
Horror, these games normally tell you how long you've taken and it's normally around 6-7 hours but you quite often dia and have to repeat stuff.
FFX on PS2 told me I had >100 hours! This might have been true but it could have been recording time when paused, some games do this and it's naff.
Puzzle Game: 10 hours I guess, they are normally cheap too.
Strategy Game: >20 hours I would hope.
Sports Game: Don't really play em, but a golf or racing game should make you want to play again any time if it's good. Mind you I do love SSX (and sequals) and these have hours of play just due to amount of retries!
Beat 'em Up. You can normally complete these pretty quick, but the fun is of course playing against other people many times.
Point'n'Click: 10+ hours, doesn't have to be that many as it's like a movie kinda thing plus you get stuck on puzzles which slows you up.
Good RPG (Baldurs Gate, Neverwinter Nights) 30-40 hours if you bother with the smaller quests.
Platformer around 15-20 hours if lucky.
Horror, these games normally tell you how long you've taken and it's normally around 6-7 hours but you quite often dia and have to repeat stuff.
FFX on PS2 told me I had >100 hours! This might have been true but it could have been recording time when paused, some games do this and it's naff.
Puzzle Game: 10 hours I guess, they are normally cheap too.
Strategy Game: >20 hours I would hope.
Sports Game: Don't really play em, but a golf or racing game should make you want to play again any time if it's good. Mind you I do love SSX (and sequals) and these have hours of play just due to amount of retries!
Beat 'em Up. You can normally complete these pretty quick, but the fun is of course playing against other people many times.
Point'n'Click: 10+ hours, doesn't have to be that many as it's like a movie kinda thing plus you get stuck on puzzles which slows you up.