Games

I would give Path of Exile 2 a try if you liked Diablo.

I'm not sure whether you're looking for games that bring back childhood nostalgia or if you just want games with the same cognitive load as Diablo 3. Regardless, I would highly recommend jumping into the Roguelike genre. Many games in the genre are modeled after games we played as kids, but with twists.

Roguelikes/Roguelites/Games with Rogue Elements

• If you ever played Diablo 1 or Diablo 2 and want more of those games, Halls of Torment is a good one.
• If you played side-scroller beat 'em ups as a kid, Absolum is a good time.
• FTL: Faster Than Light is an OG in the genre and holds up to this day. It's largely a spaceship management game with text-based RPG elements.
• Brotato is one of the few of these games that I've 100%. It's a great game to play while listening to podcasts or music.
• If you like card games or deck-building Balatro and Slay the Spire are incredible.
• Risk of Rain 2 is one of my favorite games of all time. It's a third person shooter with a mysterious, sci-fi setting. If you'd rather play a side-scroller, Risk of Rain Returns is the remake of the original and is also fantastic. Both have the same arcade-y feel that you likely enjoyed with D3.
• It's already been mentioned, but both Hades 1 and Hades 2 are fantastic.
• Crab Champions is an underrated shooter
• Heroes of Hammerwatch II has already been mentioned, but it has similarities to Diablo
• Into the Breach is a great tactics game
• Returnal is an awesome third person shooter
• If you ever played Geometry Wars, I can't recommend Sektori enough
• Vampire Survivors - most people have heard of this one
• Glyphica is a typing game

Some honorable mentions that aren't really roguelikes but are still fantastic, laid-back games:

• Tetris Effect
• Lumines Arise
• Bro Force
• Dredge
• Katamari games
• Spritfarer
• Superflight
• Need for Speed Unbound reminds me of Need for Speed Underground of my childhood. It's got cringey dialog, but the gameplay is good.

Some older games

• Descent 2 - Doom, but in a space ship basically.
• Diablo 2 Resurrected - IMO better than Diablo 3, but YMMV
• Baldur's Gate Dark Alliance - Surprisingly decent ARPG that I played on gamecube as a kid
• Starcraft 1, Starcraft Broodwar and Starcraft 2 campaigns
• Pokemon, as some suggested. I would recommend just starting at the beginning with red, blue or yellow. They're probably dated at this point, but I'm sure they hold up.
• SSX Tricky and SSX 3 are awesome snowboarding games that can be emulated on PC
• Pokemon Puzzle League - lesser known, but addictive tetris-like game
• Pokemon Pinball - one of my favorite pinball games
• Pokemon Snap - Chill game where you take pictures of Pokemon
• Super Monkey Ball - you're a monkey in a ball that has to navigate obstacle courses by moving the world around you
• Honestly, just look up the best games that you never played for systems during your childhood at emulate them. The PS2 alone has thousands of hours of RPGs that are some of the best of all time (shadow of the colossus,