- Shadows now render on the ceiling in reverse gravity.
- The game now saves as the level ends. If you exit a special stage and re-enter the game, you will be in the next level.
- You can now play as any character in NiGHTS mode.
- You can now use SOC and Lua to make custom skincolors.
- OpenGL has received an overhaul, resulting in performance improvements and shader support. The game ships with some shaders, but if your machine can’t handle them, you can turn them off.
- Updated music for the tracks originally sourced from Mystic Realm.
- We added Marathon Mode. It’s for full game speedruns. Find it under the 1 Player menu. We also included options for Ultimate Mode and for creating a backup to come back to if the game crashes during a live event.
- Knuckles no longer crouches for as long after landing from a glide, making him lose less momentum and feel a little less chunky. He can swim underwater, too, which controls differently from gliding. We gave him a little something extra, too…
Full changelog available at https://git.magicalgirl.moe/STJr/SRB2/wikis/2.2.5-changelog
Patch notes video available at https://www.youtube.com/watch?v=sHxUbX269IE