Lore Master
My son showed me this really simple game last night. It's called

It's a super simple concept. You team up with other players and build a base. You defend the base from opposing players. Although it's very simple it's also quite addictive. I ended up playing this game for over an hour straight.

I was thinking we could use this as a template for building a simple multiplayer game that builds on Terasoly's strengths; namely, multiplayer, open-world, and building. Maybe we can challenge our Google Summer of Code students to re-create this game in Terasology.