"What's Behind the Door?" is a mobile game that takes place in the Auriga system, where a group of condemned criminals are being sent to colonize an unexplored planet. The prisoners are promised a chance to earn back their place in society, but they soon realize that they will be used as slave labor. The planet, Auriga Prime, was once home to a major settlement of the Endless, an ancient and advanced civilization. The planet is also protected by a powerful defensive system that destroys the prisoners' ship upon arrival.
The surviving prisoners must now navigate through the dangerous and mysterious planet, facing monsters and uncovering the secrets of the Endless. The game allows players to gather a team of heroes, each with their own unique strengths and weaknesses, and equip them with powerful abilities. Players must also manage the balance between the ex-prison inmates and the guards, who may have conflicting interests.
In order to survive, players must gather Dust, a valuable resource that powers the rooms in their base. They must also use scarce resources to build modules that will defend against waves of monsters. By decoding Endless ruins, players can discover new technologies that will aid in their survival.
As players progress through the game, they must open each door with caution, as it could lead to danger or valuable resources. The game offers an infinite number of levels and layouts to explore, and players must fight their way to the surface to uncover the truth about Auriga.
The Apogee Edition of the game includes additional content such as new ships, game modes, characters, and monsters. The game has been carefully redesigned for mobile devices, with a revamped interface and the option for cloud saving. Players can purchase the full game and all DLCs with a one-time payment, without any ads or in-app purchases. If players encounter any issues, they can contact customer support for assistance.
"What's Behind the Door?" is published by Playdigious and developed by Amplitude Studios. The game features trademarks of both companies, as well as SEGA, who holds the rights to the game. All other trademarks, logos, and copyrights belong to their respective owners.