Grobda

Grobda is a multi-directional shooter arcade game that was released by Namco in 1984. It is a spin-off from Xevious, as the player's tank (the eponymous "Grobda") first appeared in that game as an enemy.

Introduction
The player controls Grobda, a tank trapped in an arena filled with numerous indestructible obstacles - and several enemytanks. Whan an enemy tank is killed, it will cause an explosion and any other enemies that happen to be around at the time will suffer the same fate. But if Grobda is too close to the explosion, it will also be killed. Grobda has a shield that offers very temporary protection from enemy fire, but it will soon disappear if constantly under attack.