Game was intense and I couldn't put it down. A million times better than the old doom games, not saying much. Only critique is it was a little monotonous at times, but diverse enough that it didn't take away from the game or missions.
If you have been playing video games since 90s and want to recall what it was like in the early days, go for it. Rental only. If you want a challenging game, skip this one. Was interesting, but I would rather play something newer.