Achevements are a game mechanic in The Return To Freddy's Remastered.
Confirmed by BFP in this tweet.
- The Achevements are all mostly powered by a Clickteam Fusion 2.5 extension, Get object.
- In the teaser game for TRTF:R, There is a Game Jolt icon in the files. This icon was seen before BFP even tweeted about there being Game Jolt achevements in TRTF:R.