Well I always see topics about people needing a good gaming laptop, but I have a different question. What are some good games to play on a crappy laptop. In other words, old ass PC games. I already have Torchlight, Minecraft, Terraria, Dungeons of Dredmor. Do you guys have some recommendations?

Thanks in advance.

There's a bunch, not only old. A few I can think of that are right in my Steam list: Frozen Synapse, Jamestown*, Super Meat Boy*, Atom Zombie Smasher, Braid, Sid Meyer's Pirates, Gratuitous Space Battles, Machinarium and Magika. (* denotes preferable with a controller)

There's a lot of PC games out there that can run on some low end hardware, simply because the time and effort needed to come up with the art assets you see in a AAA are expensive as hell, and as such it's much much easier for indie-er developers to go with something much much lighter on the graphics end of things.

Most anything from a Humble Bundle, Audiosurf, Warcraft 3, Starcraft 1, quite possibly Starcraft 2, some of the Civ games, RollerCoaster Tycoon 1 and 2...
 
There's lots out there.

• Theme Hospital
• Populous: The Beginning
• Diablo 2
• Warcraft 3
• Starcraft
• Baldur's Gate
• Planescape Torment
• KOTOR
• Jade Empire
• Sanitarium
• Vampire The Masquerade: Bloodlines
• FEAR
• Condemned: Criminal Origins

World of Goo, and KotOR run fine on my craptop.

The original Fallout games are all you need.

Heroes of Might and Magic 3

Stronghold (the original)

• Half-life series
• Counter Strike - Day of Defeat (source versions ran fine as well)
• Recettear
• Civilization series
• Trine
• Majesty
• Age of Empires
• Sim City 4
• Beat Hazard

Fallout 1&2, Breath of Death VII/Cthulhu Saves the World, Max Payne 1&2, the Penumbra series, Half-Life, Counter-Strike, Doom, Quake.

Age of Empires 2, Stronghold Crusader