Cataclysm Dark Days Ahead has been mentioned so I'll add OpenMW to the thread. It's a open source engine rewrite of Morrowind and requires the base game to run Morrowind but it has the potential to be used to create new games and the devs are looking to expand it to allow the creation of ARPGs as well.
Another worthy mention is Endless Sky, it's an open source game inspired by the classic space trading and combat game Escape Velocity.
Since you mentioned OpenMW I thought I should mention Daggerfall Unity. It's an rewrite of Daggerfall using the Unity engine, also requiring the original files. The best thing about is that the developers have made it easily moddable and a very healthy modding community has sprung up for it, some of which really make the game feel like what the original developers were going for but had to deal with the technical limitations of the time.
Endless Sky was surprisingly addictive to me, it really scratched the exploration itch. Sadly I played through most content at some point, so now I'm waiting for there to be enough new stuff for me to play again. I really enjoyed it, including the stories and lore and universe!
I also played through most of the content at some point, but when they eventually updated with new content I couldn't get back into it. Maybe I should try again because that was such a fun game.
Cataclysm Dark Days Ahead has been mentioned so I'll add OpenMW to the thread. It's a open source engine rewrite of Morrowind and requires the base game to run Morrowind but it has the potential to be used to create new games and the devs are looking to expand it to allow the creation of ARPGs as well.
Another worthy mention is Endless Sky, it's an open source game inspired by the classic space trading and combat game Escape Velocity.
Since you mentioned OpenMW I thought I should mention Daggerfall Unity. It's an rewrite of Daggerfall using the Unity engine, also requiring the original files. The best thing about is that the developers have made it easily moddable and a very healthy modding community has sprung up for it, some of which really make the game feel like what the original developers were going for but had to deal with the technical limitations of the time.
Endless Sky was surprisingly addictive to me, it really scratched the exploration itch. Sadly I played through most content at some point, so now I'm waiting for there to be enough new stuff for me to play again. I really enjoyed it, including the stories and lore and universe!
I also played through most of the content at some point, but when they eventually updated with new content I couldn't get back into it. Maybe I should try again because that was such a fun game.