Facepunch launches s&box, the highly anticipated successor to Garry's Mod
gamingonlinux.comThe game itself is open source (https://github.com/Facepunch/sbox-public) and been in development for quite some time, but finally "launched" ~1 week ago. You can even see their finances from the launch :) https://sbox.game/metrics/finance
Oh man, the amount of hours I've spent playing the game. Such joy
Damn, less than 50% rating on Steam.