Casualties: Unknown

Humanity has technologically progressed significantly. Things that seemed impossible before were now commonplace.
At the center of it was one company. Their progress seemed miraculous, but they guarded their secrets closely.
Years ago they had created a new species: a combination of animal and human DNA they simply called "Experiments."
These experiments were the perfect test subjects, close enough to humans, but theirs to do with as they pleased. They toiled over them, twisting their biology even further to suit their needs, and as the years went by, the population only increased.
None would ever see the outside.
Now it seemed that the Earth could no longer contain their ambitions. With their newly devised teleportation technology, they set their sights on a gray planet teeming with life.
Soon enough, tons of miscellaneous cargo and trash was sent.
Due to calibration difficulties, just as much ended up in the planet's cave system as on the surface, but the project progressed smoothly.
That was, until an unknown error caused an important piece of technology to be sent deep into the caves instead.
Soon enough, the scientists had devised a plan. A plan with little risk to themselves.
The chance of success were low, but their living fodder was plenty.

You are one unfortunate specimen.

Resistance is not an option.

Casualties: Unknown is an unforgiving cave-exploration survival simulator. Your captors have tasked you with retrieving lost cargo on a foreign planet, explore its 5 layers and do your best to survive diverse hostile environments. You are just one of the thousands of test subjects sent to die.