Prime Minister Infinity – U.K. is coming for Windows (7, 8, 8.1) and Mac (OS X 10.8.5 and above).
It features the latest game engine, new user-interface, a Campaign Editor, and – of course – the 2015 campaign.
You can pre-order, and receive the latest pre-release version (and then all subsequent updates).
Owners have access to both Windows and Mac versions.
Pre-orderers are also eligible to get the game at a discount, at £9.95 (instead of £14.95) or $14.95 US (instead of $19.95 US).