As announced on GOG news The Entropy Centre has dropped on GOG and it looks fantastic, admittedly I’m not familiar with the game itself up till now and seemingly it also dropped on Steam yesterday (and already has 10% off)
The main takeaway from this is the very positive, thus far, reviews of the game
Think in reverse. Outsmart the impossible. The Entropy Centre is a mind-bending first-person adventure where you solve ingenious and complex puzzles by rewinding objects through time. And it is now available on GOG with a 10% launch discount that lasts until November 10th, 8 AM UTC.
You appear to be the last remaining person alive. Mankind’s only hope lies at the core of the titular Entropy Centre.The truth behind its imminent collapse, and the Earth’s demise, can be found at the heart of this sprawling dangerous facility. But will you accept the unfortunate truth that awaits?