Shadowgrounds | The Humble Store | 39p (Steam RRP: £3.99)
If you're in the market for a bit of hectic top-down shooting, Shadowgrounds is going to be 39p well spent. It's old-school running and gunning at its most ridiculous, and a damn sight better than the Alien Breed reboots. The Humble Bundle will flog you a Steam code at what appears to be a 90% saving. Thanks to the ever-vigilant jaystan @ HUKD!