Favorite "Indie" Games

[Agema]

Great for fun although it's not hugely difficult, try Plants vs. Zombies by Popcap.

Plenty of free online games too. I know several people who play Ogame (www.ogame.org) which is about building a space empire. There's the old classic Urban Dead where you get to be a zombie or survivor (www.urbandead.com), there's a more detailed and rather superior game along similar lines called Nexus War (www.nexuswar.com) although membership is in precipitous decline. There are always also fun little online games like Desktop Tower Defenc(/s)e, or Spin The Black Circle, all easily Googleable.

[Illuminated One]

Soldat. Name says everything - except that it has Chainsaws and Jetpacks and Tactical Trenchwar, Dodge the Knife and other fun game modes.

http://www.soldat.pl/en/

edit: Oops, not really a strategy title...