I recently booted up Half-Life 2 to replay it. I have played the absolute shit out of this game before, so 60% of it just feels like a drag to me now. It was such an amazing game but it's sort of spoiled for me after I've played it too much.
I also discovered ULTRAKILL a few months ago. I feel like I could play that game forever. It has tons of content, weapon combinations and higher difficulties with different enemy behaviour.
Do any of you have more game suggestions like Ultrakill? A really replayable singleplayer game.
!!BTW I don't mean online multiplayer games or games similar to candy crush!!
Generally games with random elements are considered to be good for dumping tons of hours into. So games with randomly generated worlds like Minecraft, roguelikes, strategy games that are always variant just because of the nature of AI actions always being a little randomized, and other stuff like that. So maybe like Minecraft, Dwarf Fortress, Crusader Kings 2 or 3 as like a basic list. But really the game that's going to be the most replayable is the one you don't get tired of. I've beaten Thief: The Dark Project hundreds of times and that game is a relatively simple level-based stealth game with no random elements and not even especially huge levels.