Alternate fire has been applied brilliantly in Planetside. However, I would be breaking the nda were I to discuss it here. Nevertheless, anyone who cares about Tribes should see what Dave G. has done with Planetside either by joining beta or buying the game when it comes out. In my estimation, many tribal artifacts have been borrowed and improved upon, and have been interpreted in various successful contexts, which T1 and T2 were not able, or possibly intended, to do.