All these different play modes, fucking co-op, spiffy hats and weapons, amazing characters that you can’t help but love.
Then you have the amazing comics and videos that Valve makes just for the fans to spaz over and enjoy.
Not to mention it’s got a great fandom with minimal drama nowadays and a never ending supply of feels, fanart and fiction.
And the best part of it all…
This shit is all 100% free.