BTB Airlines is an action packed vehicle deathmatch mod placed in large "Rats" style maps, powered by Serious Engine 1. The mod features advanced physics implemented using ODE (Open Dynamics Engine). ODE not only enables detailed vehicle physics, but also features such as ragdolls, dozens of movable items, bullets that are modeled as actual flying projectiles and per-polygon hit detection. The final release includes 4 cars and 3 airplanes which can be blown up with 7 different weapons, and of course the first manipulator ever to appear in a multiplayer game!