One of the best strategy games of all time, Command & Conquer: Red Alert 2 is free on Electronic Arts' Origin service right now. And that's not all, the company is throwing in its expansion pack, Yuri's Revenge as well. The downside though is that you'll need to use the Origin client to get it though.

Classic RTS Command & Conquer: Red Alert 2 is the latest freebie offered by Electronic Arts' "On the House" Origin scheme. On the House, for the benefit of those at the back of the class, works like this: Selected games on Origin are made free for a limited time, and if you grab it within that window then it's yours to keep forever.