A cartoonishly good strategy game is free on PC for a week

Epic users can snag a tower defense game with over 300,000 "overwhelmingly positive" reviews on Steam for free.

If you've got a spare 200 hours, the massively ambitious sci-fi grand strategy from the creators of X-COM: The Long War just launched out of early access

Terra Invicta aims to be the last word in preparing Earth for alien invasion.