What is this? Penumbra? I don't think so!
Its simple. Requiem stays away from the concept of the other Penumbra games by giving the player a "new vision" or "game style" that dont match the other 2 games. Requiem is the final chapter in the series and just ruins them for sure.
Remember in Overture and Black Plague, the dense atmosphere, a close environment, alone in the darkness while running and hiding from enemies and creatures? Well forget about that! In Requiem there arent any "Scary Moments" or enemies. You heard me! There ARENT any creatures in the game.
Requiem consists only in puzzle solving. Every level has a puzzle that is required to solve to advance to the next one and by...a portal. A portal! What the hell?? Despite being some creative puzzles in game, any Penumbra fan will get bored with the game by not respecting the last games, Overture and B.Plague gameplay. And, why to you have unlimited flashlight power in Requiem?? The glowstick doesnt make sense them, but in fact, you DONT pick any usefull items in the game. The only things you need to pick are some books and pain killers...horrible.
The story is bad much has the game. Sure, its features some cameos, but it will bore you to death while you are solving the puzzles, that by the way, only get "better" with the CRAZY AMOUNT OF LAG that Requiem has.
Has stated above, Requiem, lags. Imagine a puzzle where you have to put boxes in the right places to jump...and the game lags to a point you get frustrated and frustrated for not doing the puzzle right.
Concluding: Penumbra Requiem is a TOTAL LETDOWN to the game series. Its not Penumbra 3, its pretty much: "Penumbra Puzzle Solve Time with no Enemies or Scares"