How would I recreate the retro physics engine? (without rewriting the entire physics engine myself)

Hello everyone!

  1. What do you want to achieve? I want to recreate the Old Roblox physics engine in Modern studio, specifically around 2008-2009. I don’t want to write the thing from scratch though.

  2. What is the issue? I couldn’t tell you where to start.

  3. What solutions have you tried so far? I’ve looked around and couldn’t find it, except for one which didn’t work at all.

Thanks!