Tip after playing for one night:
Remember to save, as there is no autosave.
Unfortunately, Quicksave (F5) does not work on Xbox, and cannot be bound to a controller key.
This upgraded version of Quake 2 comes with high-definition widescreen support, enhanced models, improved enemy animations and gore, enhanced cinematics, anti-aliasing, depth of field, up to 4K/120FPS support, and much more.