What Steam game should I buy?

I’ve only recently got into playing games and now I wanna try a good shooter multiplayer/online or whatever and was wondering what you guys would recommend?
Answer #1
wait 2 days for call of duty black ops.
Answer #2
Counter Strike: Source FTW!!
Answer #3
1. Counter-Strike: Source
2. Team Fortress 2
3. Battlefield Bad Company 2
4. Call of Duty: Modern Warfare 2
5. Killing Floor
6. Left 4 Dead 7. Left 4 Dead 2
Warning: Beware of young kids.
Answer #4
1. bad company 2
2. cod black oops
3. tf2 4. counter strike source: <- last position cause u’ll get owned if u havent played it be4. Too many hardcore players outthere
Answer #5
COD: MW2;
Team Fortress 2;
Left 4 Dead 2;
Answer #6
-Call Of Duty:Modern Warfare (First Person Shooter)
-Call Of Duty:Modern Warfare (First Person Shooter)
-Battlefield:Bad Company 2 (First Person Shooter)
Answer #7
Team fortrees is PHUN!
TO PLAY MULTI!
Answer #8
black ops for sure..comes out in 2 days. Left for dead series is great = zombie shooter
and if you want the most classic old school first person shooter get counter strike source.
oh and if you havent played the half life series get half life 2! epic