Available PC "Light" Videogames

Trying to findsome "light" videogames. By "available" and "light" I mean they...

1. Singleplayer and offline.

1. Can be bought now (not neat games from 2001 that's impossible to buy).

2. Not 5GB - not even 1GB - in file size. Portable is a plus!

3. Can just play it for 30 minutes to 1hr at a time.

4. Can be loaded fairly quickly.

Really looking for something that's a cross between a Flash (they're usually too short) and an arcade (they're addictive) type game. Something to play around with while doing massive downloads in the background.

Anyone with a heads up?

trackmania nations (bonus, its free)

darwinia

Sam & Max season 1 and season 2 episode 1. Very funny game.thusaha

Definitely.

Check out also Mount & Blade. (not sure about the size though)

Updated requirements, since I'm getting many replies for MP games (can't really download well playing a MP game!).

Are there any full featured Flash games that can be played offline (Tetris/Frogger/Moonlander type arcade)? Something that can be replayed for about 30 minutes at a pop?

Puzzle Quest.bigmit37

Tried looking but can't find the system requirements for that game, would you know?Looks interesting to pass time with, though.