WiBArm

WiBArm (PC-88)  1986

First third person game to use 3D polygons, allows full 360-degree movement

Gameplay video

Trivia:
1) It combined run and gun shooter gameplay with role-playing video game elements.
2) Like in almost any early 3D game, player can't move backwards.

3) For more Mecha games watch AX-6: Powered Knight.

4) Emulated in: M88