Adventure was a passion project of mine to make an advanced quest editor in Unreal Engine, using my custom Blueprint graph. It was also used on Outpost: Glacier to make quests.
It can create branching quests very easily with many different conditions. It also supports multiplayer out-of-the-box.
It's not currently maintained, but it works, just wanted to put it out there as a learning resource for anyone wanting to learn more about making your own custom graphs/node systems in Unreal Engine 5.