Skullgirls with all DLC for $1.49.
Base game on Steam for $4.35 + $6.45 for DLC, so a total saving of $9.31 compared to Steam.
Limited stock, but otherwise ends 1AM on Saturday 06/07.
I've only played a couple of hours, but it's a fun little fighting game, so I'd recommend picking it up if you've ever been looking to try it out.