Looking for an cool games for my old pc (just for advices, not begging)

Video: Fx5200 128mb (usually games with lowest requirements with 128mb looks like slideshow, 64mb is running well)
Proc: Pentium 4, 2.4 Ghz
RAM: 2gb (the oldest one, ddr1 i guess)
CRT monitor :D
Yea, my fam cannot afford the new one, and this is too old to upgrade it. Even a google doesn't know my motherboard :D Guess it's Chinese xD

So, what am i looking is an awesome games for it. Cause in meantime i usually can see only games for offices, such as lucid, bejeweled, zuma and crap like that. But i don't like em.

Which games i like: VTM:Bloodlines, Half-life series, Splinter cell, Killing floor, cs, Penumbra, Dark Messiah M&M, Deus Ex collection, dmc3, old gta series, HOMM series, Sid Meier's Pirates, Terraria.

So, what u can advice me? Please, do not advice me games that i already have, or which is in my wishlist. Also looking for some race games, found only some of them, and they're expensive a bit.

Why i asking on this forum? It's because last time when i bought games (traded, doesn't matter), they weren't work! Feel that time so angry). They're names are: Rig'n'Roll (playing it slideshow like), X3 (i can play it, but it too slow. My nerves are not good enough for it), Sol Survivor (can't run it -_-)

There're also one fact, some games are forbidden in my region, such as doom3, Pirates! (got pirates from an american friend, awesome game). So, if u know some of them that can be runned well and the're not available in ru region, please tell me.

And i'm mostly looking for games that available on steam