Loot-obsessing, tower defense action game Dungeon Defenders has surpassed 600,000 sales since its launch in mid-October. In coincidental celebration, "The Lost Eternia Shards: Mistymire Forest" DLC (released last week on Steam) is now available for 320 MSP ($4) and $3.99 on the Xbox Marketplace and PSN, respectively. The DLC includes four new missions, a new boss, new loot and a crypt-ton of spiders.

Developer Trendy Entertainment's first major success comes from one the most content-packed downloadable games of the year. Sales of Dungeon Defenders, which have favored PC thus far, have been assisted by several deep discounts on Steam and Amazon. If you're looking for a co-op game (and we stress co-op!) over the holiday break, give Dungeon Defenders a spin.