Gmod and MInecraft are two of the most popular sandbox games.
Notch just sold MInecraft to Microsoft,and Garry Newman said he might do the same.
Visit http://www.pcgamer.com/rust-creator-applauds-the-mojang-sale-says-hed-do-the-same-thing/?ns_campaign=article-feed&ns_mchannel=ref&ns_source=steam&ns_linkname=0&ns_fee=0
for more info.

Valve just updated PAYDAY 2,adding Clover,a new playable character.
Unfortunately, you have to pay to unlock. Also, the update adds a new skill and
perk deck.This is the Christmas update. Hopefully Valve keeps updating it.