Pillars of Eternity 1 & 2. Some achievements for collecting companions, romancing, etc. Then the Iron Man/Path of the Damned/No companions achievements.

All of the major stories have ends. Original quest has you uncovering what happened to your Overseer. Wastelanders has you eventually raid a vault of gold bullion with either the raiders or settlers. Steel Reign has you fighting alongside the Brotherhood of Steel until you have to make a choice about the future of Appalachia's Brotherhood chapter.

Pathfinder: Kingmaker. Never before have I played a game that was so utterly determined to get in my way of playing the game.