Trying To Remember Old 3D Pc Maze Game

The game is pretty blocky. The variation comes from textures. There are blocky lamas involved. It has a name like Bashere.

I'm also looking for 3d free roam exploration puzzle games like Banjo Kazooie, Rocket Robot, and the Mike Oldfield VR games.

I have a game in my head along those lines. My computer is modest. Intel(R) Xeon(R) CPU W3540 @ 2.93GHz, NVIDIA Quadro NVS 295, 6.00 GB RAM, Win 7 Pro. Anyone know of a good free engine that would work? Anyone know of a graphics card I could move up to that has a Win 7 driver?