Best Low Spec Steam Games

Yeah basically what the others have already said, Valve's own games, like Portal, Counter Strike etc. Umm COD isn't demanding either, umm for rpg's, I'd say Oblivion possibly, it's not demanding at all

Fable TLC
FTL
Borderlands
STALKER- any of them, although I heard Clear Sky is the worst and has some serious problems with dual core-4 cores cpus

the best low spec game is beat hazard

SHANK 2

• Killing Floor
• AudioSurf
• Valve games (excluding CS:GO)
• Torchlight 1

Torchlight games, as said before are great RPGS/ Dungeon Crawlers that do not require a super high end PC to run.

haven't seen it yet so adding:
Star Wars: Knights of the Old Republic 1 and 2

Xcom
Fallout 1 and 2

+1 for Torchlight and Audiosurf

Also, Terraria and Plants vs Zombies are great games that can run on nearly every computer and provide hours of fun!

Get any of these games:

• Bully: Scholarship Edition.

• Killing Floor (bad first impression, great gameplay, one of my favourites).

• Hotline Miami (it has been nominated as GOTY on IGN)

• Star Wars: Republic Commando or KOTOR 1 (both run on Vista, but i'm not sure about Win7, so google that)
  SW:RC is kinda short, but i'm a FPS and it's a blast for playing. KOTOR 1 has an awesome storyline.

• Lost Planet: Extreme Condition Colonies Edition.

• Castle Crashers (awesome online co-op, a must have).

• Doom 3: BFG Edition (lots of value, it can run).

• The Last Remnant.

• Burnout Paradise (A must-have for anyone, even if you don't like racing games. Car destruction at it's finest.)

Dawn of War 2

Castle crashers. Seriously! Get that

Bit Trip Runner

Secret of Monkey Island games,
or any of the good old lucas art point and clickies

For super, ultra-low spec: Avernum Trilogy. Old school, but an obvious ton of work has gone into them.

world of goo, shank 1, shank 2, mark of the ninja