... 1,2 and 3 as far as I know. Still, the MD2 engine Legacy has is for scenery and powerups, not for everything. MD2 models can't even be run in Software yet, and can't because of the drawing engine; it's based on SIDE and FLAT rotated graphics, not like how Quake engine can rotate the pictures aswell as crop them to look real 3D
Also, you can't run OGL I guess?