Threshold , a classic Vic-20 shooter, was released on 1981. The game takes place in a futuristic world where you must defend a planet from an alien invasion. Your spaceship is your only hope for survival as waves of enemy spaceships descend upon the planet. With limited firepower and resources, you'll need to use strategy and quick reflexes to fend off the attack.
The gameplay in Threshold revolves around navigating through increasingly difficult levels while avoiding enemy fire. You'll control your ship using a simple arrow keys-based movement system, aiming to hit incoming enemies before they reach you. The game features a unique "power-up" system where collecting specific items gives you temporary advantages.