2 1/2 of the makers of the L4D(2) mod Dead Before Dawn went solo and created THE CORE.

BlahDog says

5/10 - - 2 agree (2) - 1 disagree (1)

Gameplay- 5/10
Many of the new features were left unexplained, leaving me confused at some points in the game but otherwise the gameplay was OK
Voice Acting- 6/10
The GLaDos voice is done relatively well but the rest is just bad and seemed like it was there only to have another voice
Level Design- 4/10
Way too many textures were misaligned to be acceptable and an odd use of Portal 1 textures with Portal 2 textures make the levels look very off