At first I was like wow, xenonauts 2, but then > Game Engine – using Unity3D will give us a much more capable platform for development than our previous engine, so expect fewer bugs, improved performance, better modding support, etc > 3D Graphics – moving from 2D sprites to 3D graphics will improve visual fidelity, but will also be valuable for gameplay – it allows for things like rotating cameras, vastly improved animation, physics objects, accurate projectile tracking, etc