Underworld Football Manager Try Underworld Football Manager: it's fun, addictive and appeals even to non-football (soccer) fans. Almost everybody who gave it a try loved it. It's free, and you will definitely enjoy it for weeks without paying a buck.
Did nobody reply? I've only got one of those, so I'm not the most reliable source, but I poured 50+ hours into Crashlands and didn't resent a single minute. Jade Empire is much shorter, say 12 hours, which isn't necessarily a bad thing. The Quest and Siralim 2 are both monsters, by all accounts. I'd still say go with Crashlands - I fully expect it to win game of the year prizes.
What are some good single-player shooters? Looking for something that plays like modern combat or NOVA series
I really enjoyed The Infinity Project games... Though I'm sure there's some better titles out there (I'm not big on the FPS genre)