Rogue Legacy | The Humble Store | £2.99 (save £9!)
Rogue Legacy wears its inspirations with pride -- you know, the 'Rogue' bit -- but actually presents one of the most intruiging twists on the familiar formula we've seen in some time. I.e. it's not a Roguelike. Ghosts 'n' Goblins-esque platforming goes hand-in-hand with a genealogy system that lets you create a lineage, not just a character.
You can also save £9 by picking it up on the Humble Store, which is a smart little bargain. Thanks to jaystan @ HUKD, who tirelessly rounded up these deals yesterday!