Doom: Resurrection is perhaps the best-looking 3D game on the iPhone, and is a big step up from id’s last effort, a port of Wolfenstein. But those good looks come at a price.
https://kotaku.com/id-resurrects-next-gen-doom-on-iphone-next-week-5286374
Much like Dead Space on the Wii, the unexpected graphical fidelity comes at the expense of movement, with Doom: Resurrection to be an on-rails shooter rather than a true 3D title.