Frozen Synapse is the ultimate tactical game on PC and Mac. 
It brings the simultaneous turn-based strategy genre bang up-to-date and lets you give detailed, accurate orders to your squad: classic gameplay with a modern interface. 
Plan your moves, test them out, then hit the "Prime" button: both you and your enemy's turns are executed simultaneously. 
Competitive-but-intuitive multiplayer and a huge single player campaign mean that Frozen Synapse will give you hours and hours of tactical delight. 

Key features:

• Get a FREE full copy of the game for a friend with every purchase 
• 5 challenging multiplayer modes, including the innovative bidding-based “Secure” and “Hostage Rescue” 
• 55-mission single player campaign with dynamic dialogue and thrilling near-future narrative 
• Powerful Skirmish Generator 
• Facebook, Twitter and YouTube integration 
• 15 Steam Achievements 
• Integrated IRC chat as well as various community features 
• Random generation combined with hand-crafted content means that levels and maps are different every time 
• Critically-acclaimed electronica soundtrack by musician nervous_testpilot