 Obsidian is an action-adventure presented in two dimensions, spread across approximately 50 game screens. Locations contrast between spaceship interior and rock surfaces. Players control a jet pack wearing astronaut who must deactivate the five engines of the titular spacestation Obsidian, which is located in the hollow centre carved out of an asteroid. Objects are stored in gravity boxes on the station's ceilings, only one object can be held at a time. These are used to solve the game's puzzles and allow the player to continue further into the game. Each object's purpose must be discovered as they are not labelled.
