Cool games ( Note I am a RTS fan)
Fallout 3: (RPG)
A roleplay game where you are set into a land where everything is destroyed. Everyone is poor etc. You need to survive into this destroyed land!
Oblivion:A roleplay game where you are set into a fantasy land where you do quests and stuff.
Gears of War: (TPS, Third person shooter)
Good shooter, 1 and 2 are both good, story is very good and so is the multiplayer!
Settler Series: (RTS)
NOTE: there is classic settlers and modern settlers.
You have to build up a city with economy and stuff.
Example: lumberjacker cuts trees, a sawmill makes them wood, and a forest hut puts new trees for the lumberjacker to chop. ... Or a grainfield, mill and a bakery!
Difference between classic settlers (Settlers: 10th anniverary and Settlers V) is that sellers 10th anniversary uses the classic system of system and its better. But Settlers V is better in graphics and more RTS like.
Anno 1701: (RTS)
Great game where you colonize an island and you build up a big city! Alot like Settlers just a little different, better army system but building takes longer generally
Company Of Heroes: (RTS)
Simply the best WW2 game with good graphics. But the orginal version, not the standalone expansion.
Faces Of War: (RTS)
This is a RTS too, but it is more fighting with little army's and pretty realistic. You can take direct control of units and everything has an inventory and stuff. Pretty cool but multiplayer tends to be laggy. Check out Soldiers: heroes of WWII, its an older version but it seems to be less laggy.
Warcraft III + Expansion: (RTS)
One of the best RTSes ever made. The maps are realy differen. Tower Defense, Mauls, Hero Line wars, Worm war, DoTa or just simply a normal RTS game.
Mount&blade: (TPS, RPG)
A really nice Independent game if you like controlling a medieval char and hiring soldiers and get strongo ver time ruling the whole world by fighting army's etc. Try out the trial! It has unique gameplay experience!
Also, mods are made that might improve the gameplay experience. graphics too low? Download the graphical enchantments from the forums! they increase the graphics alot!
Cortex Command: (Side Scrolling Action Strategy game)
Ever dreamed of a game where you build a base (comepletely with parts and stuff) and then you order robots and stuff to defend it? Well this is the game for you! you can equip your soldiers with weapons and stuff and shoto the enemies!
Check out their homepage, the game is still unfinished but it's pretty funny, especially if you know someone who wants to play it.
Clonk: Rage (Side Scolling Action Strategy Game)
Mine oil, gold, stones etc. and make a base! pretty hard to explain. --->
www.clonk.de <--- check it out. Has unique gameplay with big replay value if you play online!
I think thats all...