Irrlicht Engine

http://scpcbgame.com/

SCP - Containment Breach is a free survival horror game written in Blitz3D.

The events of the game take place in a containment site of The SCP Foundation, a secret organization dedicated to containing and researching anomalous artifacts and entities that threaten the normality of the world. You're thrown into the boots of a Class D test subject, one of the Foundation's disposable human guinea pigs.

Not long after receiving your first assignment, the facility undergoes a massive containment breach, leaving you alone in the darkness with the escaped entities roaming around the facility.

Your goal is to make it out alive. You can also search the facility for documents and other clues to figure out what led to the breach, and even attempt to do your part in fixing the situation.