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!!
Even if one gets bored of the game itself, there's a practically infinite number of mods and community content out there. New game modes like skyblock, mods that turn it into an RPG with magic systems, mods that make it an in-depth factory building game, mods that take you to new realms and thousands of items to discover... There's a lot to enjoy.
Adventure maps are also fairly underrated. There are tons of community-made maps that can turn it into a different game. Notably, there was a huge Hogwarts campaign with quests and spells that turns it into a harry potter game: https://www.youtube.com/watch?v=BKcsoE5X4fc