What is the best (post 2002) pc game?

Question

I would like a game without activation limits (though some form of DRM is acceptable).

My specs are:

intel core 2 duo 2.1GHZ

200GB HDD

2048MB ram

Nvidia geforce 8400GS (128mb ram dedicated- 1024mb shared)

Windows vista home premium

I do own a steam account so steam games accepted but no other download-only games.

Answer 1

any blizzard game warcraft,starcraft,diablo

Answer 2

There really isn't a "best" PC game, but here's a list of games you may like:

The Orange Box

Command and Conquer: Tiberium Wars

Call of Duty 4

Unreal Tournament 3

Battlefield 1942

World in Conflict

Enemy Territory: Quake Wars

That's what immediately comes to mind, though you'll probably want to upgrade your graphics card to an 8800GT along with your power supply.