Dungeon of the endless is the award-winning Rogue-like dungeon-defence game, in which you and your team of heroes must protect the generator of your crashed ship while exploring an ever-expanding dungeon, all while facing waves of monsters and special events as you try to find your way out...
what's behind the door
a few hundred Condemned criminals were being shipped to the auriga system on board the prison Hulk "success". While this was presented as a chance to earn back their place in society by working hard for the Common good, they understood that in fact they would be slave labour, sent to Colonise an unexplored planet. All they knew about auriga Prime was what the probes told them: it had water, temperature zones, plant life, and plenty of metals in the crust. In fact, the planet auriga once hosted a major settlement of the galaxy-travelling ancestors known as the endless.
in addition, the planet was still orbited by a functioning (and well cloaked) defensive system, which sprang eagerly to life upon the arrival of the success. Within a few minutes, the ship was nothing but a few large chunks of metal falling toward the planet. Luckily, every set of holding Cells also functioned as an escape POD, so the ship let itself disintegrate and the surviving prisoners fell bruised but (temporarily) alive and (momentarily) safe to the planet below.
safe, that is, until they realised that they had crashed through some sort of endless facility, all the way down to a sub-basement so deep and ancient it might as well be called a dungeon>.