Alien is harder, Outlast is scarier and RE4 is better
This game simply arrived at the wrong time. Release it a few years earlier, when horror games were at a real low-point, and we'd be raving about it as the game that inspired the genre's comeback. It's not a perfect horror game, but it's a big step in the right direction - or at least, it would've been. But now, in the midst of excellence like Alien Isolation, Outlast, Resident Evil & the announcement of a new Silent Hill installment, The Evil Within has sort of fallen by the wayside a little.
And that's fair enough - compared to those other games, The Evil Within doesn't quite stack up. Alien Isolation remains taught and tense throughout, Outlast pulls no punches with the scares, and Resident Evil & Silent Hill are genre legends which rarely misstep.
But The Evil Within, despite starting very strong, fades quickly. The undeniably terrifying atmosphere of the game's early stages soon dies down to a mild sense of annoyance at the confusing storyline and simplistic challenges (boss battles and puzzles are so easy to overcome it's almost insulting) while the characters and voice acting are severely lacking - Jackie Earle Haley as Ruvik is a chilling villain, but the protagonists are all fairly uncompelling and forgettable. Sebastian Castellanos has five different companions during the game, and you find it difficult to care if any of them survive (Castellanos himself included). Chris and Claire Redfield they ain't.
But these are classic flaws of survival horror games, and it seems inevitable that The Evil Within would fall prey to them, given that it is so committed to the genre. Alien, Outlast, even the latest Resident Evil games experiment with the it's tropes, while The Evil Within proudly says "THIS is what survival horror is about". It's paradoxically refreshing in its familiarity. But unfortunately for The Evil Within, those other games are simply better experiences.
That's not to say the game isn't worth playing - it's a great example of the old-school made new, and essential for anyone eager to get (back) into horror games. There are just other games you should probably try first.