Probably the most well-known case of retrofitting an old game to use rollback netcode would be the "Slippi" fork of the Dolphin gamecube emulator to allow for s

Probably the most well-known case of retrofitting an old game to use rollback netcode would be the "Slippi" fork of the Dolphin gamecube emulator to allow for smooth Super Smash Bros Melee netplay. https://slippi.gg/about https://slippi.gg/about It was released during the pandemic when in-person tournaments could no longer be held, and allowed the Melee scene to flourish online, boasting even better netplay than the official Nintendo Switch smash game.