FootLOL: Epic Fail League
This crazy, fun, multiplayer ridiculous soccer game which even drops Steam cards is being massively given away for free on:
https://freebies.indiegala.com/footlol-epic-fail-league
Just sign in to your IndieGala account first so you can add it to your IndieGala library then reveal your Steam key for activation. If you do not want to go through this trouble, all you have to do is hit the direct download button.
EDIT: NO STEAM KEY, JUST DIRECT DOWNLOAD
On a side note, it's official: my posts no longer have the #gaming tag. Kind of sad.
But go #battle! Like palnet, for gaming. https://www.battlegames.io