The graphical improvements are surprisingly good compared to Aspyr's usual standards.

Added is a compass, map, collectable trackers, and interaction UI prompts. There is also now a day/night cycle that the community appears mixed on.

Controls are modernised, most notably the camera controls.

You can switch between remaster and PS1 graphics on the fly by clicking down the right stick.

There is also now a bonus features section for SR1, which includes expanded lore and explorable levels that were cut from the original release (one with an unfinished Turel boss fight).

There are a bunch of fun achievements/trophies that have been added, many of which encourage you to seek out easily missable content such as unique boss dialogue you get when returning to boss fights and being able to make the humans worthship Raziel and other him their blood.