I'm looking for two extras to play with over the next couple of weeks, at least until we finish the game once. Already have one person.
It's kind of like a cross between Secret of Mana and Magicka. Top-down, 16-bit, real-time combat with RPG stats, item crafting, crazy boss battles, etc. Currently if you buy it, some of the money goes towards funding the spiritual successor to Terraria, named Starbound.
Here's a two-hour playthrough with dev commentary: