I've only just got to he point that I'm sure I can make the engine work. I haven't worked out all the details yet - but basically it'll be a sandbox collecting game , with zombie / primitive enemies of different levels that you can attack. You'll be able to make small patches of land that favour the growth of different resources (eg goats will want hills and shrubs, trees will want grass and water tiles), that you can then harvest to help you on your quest to kill enemies. I don't want to have player-player conflict, but instead promote cooperation (ala tf2 or fat princess where i'll be a medic and you can be a heavy).
So yeah. Minecraft / tf2 / farmville. Just combine those.
