Arma 3 for £12.50

[Liberator]

Okay, it's a little bit of work, but worth it.

Bohemia have a 50% off sale, but another website is giving away a 30% voucher code for Bohemia as well, so you sign up to a website to get the code and then go buy the game from Bohemia at 50% off and apply the 30% off voucher.

Better explained here with links.

[BrotherTobious]

That's a bargain for a amazing game