Optimus Apparatus is a single player game combining Gravity Shooter with Action-RPG elements. Fly missions on randomly generated maps, gain cash to upgrade your spaceship. Pickup spaceship components dropped by defeated enemies and use them on your spaceship. It is possible to balance your spaceship components abilities, energy costs, weights in many ways. Construct the most effective combat machine, using many different weapons and spaceship components, each one with randomized statistics and special abilities. Components have different pros/cons which can be enhanced/reduced with other components. There are many possibilities when contracting your spaceship.