R.E.P.O. PC Steam Altergift

R.E.P.O. is an online co-op horror game featuring physics, proximity voice chat and scary monsters. You and up to 5 friends can venture into terrifying environments to extract valuable objects using your physics-based grabbing tool.

Even the monsters are affected by Newton's law of gravity!
Under the employ of a mysterious computer intelligence. It is your job to locate, transport and extract valuable items from the haunted remains of a long lost humanity.

...but know when to stay quiet.
Transport anything from heavy pianos to fragile ceramics and use teamwork to make sure that the precious cargo will safely reach its destination.