My specifications:
RAM: 2.00 GB
Processor: Amd Sempron LE-1250 2.20 GHz
OS: Windows Vista 32Bits
Graphic Card: Nvidia

This is the "mid" recommendation, but you can play a lot of games with lower specifications.
The specifications below are marked as "Very Low, Low, Medium (mine).
Only games tested by myself or other players are here.
If you want to post your game, just specific a minimun range, name, and if it needs internet connection to play.
e.g








Let me know if i have mistakes with my grammar/ortography/all, basically please.
More games and things will be added lately.
Have a nice night !