Also now available on Steam is Frozen Synapse Prime, the sequel to the turn-based tactics of Frozen Prime. This is available for Windows, OS X, and Linux, and comes with a 15% off launch discount. Here's word from Steam news:

Take on the role of Tactics, leading a rebel faction to overthrow a powerful corporation controlling the virtual city of Markov Geist. Control an elite strike team of futuristic soldiers; plot paths and issue orders to your units, test your plans and predict your opponent in each turn.