35. Championship Manager 97/98
Here's one that'll no doubt confuse some people (Americans), but it's probably one of my all time most played games. Pick a team to manage, buy/sell players, stick 11 of them in a team and watch events unfold via a text based screen. It might sound a little odd that you just watch in that way rather than playing it out yourself like you would in FIFA games, but it's actually incredibly addictive and I'd often find myself completing a season (or more) in one play session.