DNA Warrior

A horizontally scrolling shooter in which the player pilots a miniaturised Navy assault submersible injected into the bloodstream of Professor R. Szymanski, whose experimental brain implant is growing out of control. The scrolling is bi-directional and the body branches at natural and artificial junctions, some of them locked until the relevant key is found, and the mission is to collect eight scattered pieces of a growth inhibitor before a final confrontation with the implant itself. Weapons are earned by destroying an entire attack wave and collecting the plasma sphere it releases, with seven tiers running from extra manoeuvrability and rapid fire up to absorption shielding and energy replenishment.