Anything Elder Scrolls kept me busy much longer than the main story, most notably Morrowind. Also, I replayed GTA IV last week, was heaps of fun, especially compared to GTA V which I played a few months back. Read Dead Redemption 2 is a good one for this list as well, I enjoyed that one immensely, but I mainly focused on the main quest during that run-through, so this is a good reminder to myself to pick this up again soon (sadly I fell back into the pull of Satisfactory so it might be some weeks/months/… before I get to it)