I love it, I grew up playing Duke Nuken 3D and Doom and it genuinely feels like an old school FPS, I guess using the build engine contributed a lot to that, but it has nice additions, like the possibility of headshots, that as far as I know weren't in the engine back then. The level design is really cool, they are big and with lots of things to see, I read people complaining a bit about the AI movement and I agree that it could be better but for me it isn't even close to be bad enough to impact my enjoyment of the game. About the reviews, there was a review bombing after people find and the company remove a couple discriminatory assets that a dev had put in the game, so don't mind the "censorship" statements some people made here.