Gravitus is a retro video game based on the classic gravity-based shooters from the 1980s and 90s, such as Thrust, Solar Jetman and Gravitar, and of course Asteroids.

The goal in Gravitus is to steal valuable energy pods which are hidden on six planets. Inside the planets to be exact. Finding the pod while avoiding enemy fire and navigating narrow caves is only half of the mission; you also have to escape from the planet with the heavy pod in tow.