Awhile ago I undertook a goofy little “game-play study” with space ships. It has space ships I’m calling it Space-Ships. I wanted to see if 2D game-play (like S.P.A.Z.) could “feel” like traditional 3D. (like Freelancer) To study this I built a game-play prototype with a 2.5D chase-cam in (Unity) a 3D game engine. I used engine’s existing rigid body simulator (PhysX) to provide a limited version of physics. After constraining everything to a 2D plane and fiddling with the inertia values in various ways I was happy with the flight mechanics.