I think the most impressive 3rd party engine implementation is FOnline. It has been under development for over a decade and has been used by plenty of actual ga

I think the most impressive 3rd party engine implementation is FOnline. It has been under development for over a decade and has been used by plenty of actual games for almost as long. FOnline combines Fallout 1 & 2, with some additional stuff from Fallout: Tactics. It doesn't aim to be an exact copy, instead it's an evolution of the original games. It combines them all together into a single game and provides MMO level multiplayer. Lots of fun to be on the same map with thousands of players, scavenge for loot and participate in PvP. http://imgur.com/a/t6qCm http://imgur.com/a/t6qCm Currently the most active game built on top of the engine is FOnline: Reloaded. http://www.fonline-reloaded.net/ http://www.fonline-reloaded.net/ As I write this it has 100 people online. Not as active as the FOnline community was 8 years ago, but it's not abandoned yet. There are also a bunch of other FOnline games, a selection of them and their status can be seen at https://fonline-status.ru/en/ https://fonline-status.ru/en/ For development resources there's http://fodev.net/ http://fodev.net/ & https://xp-dev.com/sc/76003/HEAD/ https://xp-dev.com/sc/76003/HEAD/