You can probably run
Elder Scrolls III: Morrowind & IV: Oblivion
Portal
Portal 2
Half-Life and all its content
Half-Life 2 and its episodes
Left 4 Dead
Team Fortress 2
Counter-Strike: Source (not sure about GO)
Braid
Limbo
Amnesia: The Dark Descent
Company of Heroes
Any Total War game up until Medieval 2: Total War (I doubt your laptop would be able to run the newer ones)
Star Wars: Knights of the Old Republic
Star Wars: Republic Commando
Dragon Age: origins
Trine (possibly Trine 2)
Killing Floor (left 4 Dead-esque)
Psychonauts
League of Legends
Ummm, yeah. List of games worth checking out I know would be able to run on your laptop, more or less. Some may have hicks. Actually, ANY Valve game is really weak-PC firendly, so you might want to start off with them. Valve is like the Nintendo of the PC world, they get really great looking stuff that doesn't require powerful hardware.
Tag (Courtesy of Fkusumot) "If I'm posting in this thread then it's probally a spam thread."
