here's the changelog (subscribestar version):
V2 > V3 fixes:
-Checkpoint Save System added, it's very stable, however you can occur few bugs with it:
-There is a rare crashing when loading the save, just launch the game again and it should work
-After loading a save, an additional bugged "backpack" can appear in the inventory, which has no purpose
-After loading a save, 2 zombies in the final room can be duplicated (has no effect on game progression or anything)
- New Game+ added - it allows to play the game again, with all Items saved from the previous playthrough
- Fixed bug with Puzzles, where chip's (pieces) were flying towards the camera (pieces were reaction to collision from Objectives, which was quite unexpected)
- HDR is always returning to default after a sex scene, if you changed them
- You can now wear "open-crotch" clothing+buttplugs at the same time. Open-crotch suits can also be presented in sex scenes
- Fixed a bug, when moving Clothing from 1 active slot to another active slot will hide the clothing inside the game
- Futa-peeing inside cutscenes is no longer altering cock physics
- Added "Horse" type of futa cock (only for supporters)
- Futa cocks materials now working properly with Sand-on-body, Dirt-on-body sliders, Pubic hairs. Also "Veins" slider is now adjusting veins on cock too.
- Added "Eye color" customization slider
- Removed bug with "Physical Cloth" reacting to invisible trigger volumes
- Objectives UI logic is improved
- Various fixes for clothing/accessories
- Smooth camera transition on the end of the cutscene is fixed
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TL;DR = Nothing new added, just some sh*t to stall more time. It should be V2.5 instead of V3 and even saves doesn't work properly and what was the purpose of NG+ when the game had nothing to explore anyway. It is nothing but just a way of stall more time