Sometimes you've just got to step back and take a breather from saving the galaxy from an unknowable threat. You can't always be taking down the Reapers or raiding for treasures in lost tombs. At times you just need to zen out with the gaming equivalent of a desktop sand garden. For that I give you the one man project by Oskar Stalberg, Planet. This in-browser game is simple. You are given a small, procedurally generated planet which you are allowed to manipulate the surface of in any way you see fit. Raise or lower the land, add forests, glaciers, towns or just wipe the whole surface and have a spinning ball of water in the empty vacuum of space. The choice is yours. It's a great way to kill some time and get lost in building your own tiny little world.