First-person action game, published by SystemSoft for Japanese computers in 1986. Its polygonal 3D graphics engine was a technical milestone, rendering 3D environments at a fast pace and (compared to the tile-based, right-angle movement of earlier first-person games) allowed the player to move with full 360-degree movement.

First-person action game, published by SystemSoft for Japanese computers in 1986. Its polygonal 3D graphics engine was a technical milestone, rendering 3D environments at a fast pace and (compared to the tile-based, right-angle movement of earlier first-person games) allowed the player to move with full 360-degree movement.