Check out the four bundle options using this link.

Failure is the only path to success in this bundle of action-packed roguelikes! Form a co-op party and delve into the dangerous dungeons of Barony. Ascend a tower with an awesome arsenal in the thrilling God of Weapons. Climb aboard your robospider and dig into the secrets of Wall World. Get these games and more, and help support International Medical Corps & World Central Kitchen with your purchase!

You can always check out the most recent Humble Bundle offers here and here.