Some developers are seriously considering de-listing their games from online shops when the Unity Runtime Fee kicks off at the start of next year, meaning some titles built on Unity could end up being temporarily — or permanently — unavailable. Here's what developers are saying about the Unity Runtime Fee on social media, and what games could be impacted.
Someone has pulled off porting an Unreal map over to Unity before, but a lot of the maps lighting and other effects were completely lost. Look up Stanley parable rocket league. It’s definitely possible to port Unity maps to other engines and vice versa, but it would take a lot of work and a lot of rebuilding everything from scratch
So Davey Wreden, writer and creator of the stanley parable, has a brother who is a youtuber, DougDoug. When ultra deluxe dropped Davey joined his brother playing through the game again. Anyway, at one point in the video he mentioned that in order to port over the rocket league map they needed to hire an outside consultant to port it.