Dungeonland is a new action / RPG from developer Critical Studio and published by Paradox Interactive. The game has a unique twist on the standard formula, adding a theme park like setting mixed with fantasy characters to the traditional loot based ARPG formula. The game is set to come out early next year, but right now you can get a chance to check out Dungeonland by signing up for the closed beta.
The full game will support four player online co-op as well as another mode where one player is a dungeon master of sorts, controlling creature spawns and placement versus the other players. It's unclear just what modes will be available to play in the beta.
Interested parties need only follow this link to sign up.
Source: Beta.dungeonlandgame.com