If you not interested in Dota 2 I also play other games.

Multiplayer games on steam that I currently have, all F2P tho.

alien swarm- not played for a long time
codename cure- sometimes
dota 2- most of the times
the hidden source- sometimes
modular combat- sometimes
no more room in hell sometimes
spiral knight- not played for a long time
team fortress 2- sometimes
trove- sometimes
unturned- most of the times
zombie panic source- not played for a long times