Best Steam Game?

[I AM REBORN]

List your top 3 Steam Games of all time!

 

[Suppressive]

I had a lot of fun playing Team Fortress 2 and CS.

 

[Laptop65]

http://store.steampowered.com/app/10180
http://store.steampowered.com/app/221380
http://store.steampowered.com/app/72850/

 

[neverine]

Garys mod. TTT is fun af.

 

[jodarok]

Ghost Recon Phantoms, ftw

 

[Proportions]

cs 1.6 , garrys mod, tf2

 

[3ugene]

MW2
CSS
Killing Floor