In that case, you can try Infiniminer
(also open source I believe) and a really HD version of Minecraft can be found here
(not open source).
Also, I've seen someone make a 3D game in Construct before complete with 3D models (before the 3d model plugin was made). He made everything from scratch and math though, so it's possible, but very hard.Jayjay2011-08-08 15:23:22