Warlocked for GBC - it was ambitious as hell, and has some quality scenario ideas.

God Medicine. Genuinely one of the best classic style JRPGs and the best RPG on Gameboy in my opinion. Absolute travesty that the west never ended up getting it originally.

Aside from a few classics I'm sure you've already played, I remember playing Wario Blast and Taz-Mania fairly often.

I haven't played either one in years, so I don't know how well they still hold up.

Cosmo Tank. Got it as a gift from my dad and loved it when I was a kid. I may have to revisit it myself.

Elevator Action, fun platform shooter made in 1983. I spent countless hours playing this game with my babysitter.

Here's one I played a lot of and loved that I never hear about anywhere... Bionic Commando - 1992. A port of a Nintendo game I only got to try a few times, but the game boy version was better to me.

The Moomin game is great but nobody talks about it. The two Survival Kids games are incredible as well but damn they can be depressing. They really out a full on survival game on a Game Boy. Complete with multiple endings, open world and hunger and thirst mechanics.

I only ever really had the basics with my Gameboy sadly, but I had a lot of fun with Pokemon Red and Zelda Links Awakening (which I prefer to the DX version where they removed the fun teleporting glitch). Now I went this thread for other systems like PSX, lol.

Wario Land 2 + 3 Were the first games I ever played on a Nintendo handheld. I still play them through once a year because of nostalgic reasons. Plus they are one of the most enjoyable Jump and Runs for me.

I had an Itchy and Scratchy game (from the Simpsons). It was a mini golf game that was a lot of fun.

Ninja 5-0 for the GBA. I got out my collection recently and had no idea I owned it. It's Elevator Action, but you're a ninja.

Radar Mission. I can hear the music in my head from both game types whenever I think about it, right down to the music when the carrier launches the fighter. I enjoyed both game types a lot, though I remember getting frustrated as a kid until I learned the nuances of the opponents.

The Machine (2021). It’s not so much obscure as it is just niche. It’s wonderful. Multiple playthrough, knowledge retains between runs, so you can unravel more and more of the mystery of The Machine. Highly recommend for anyone interested in political games. I bought the actual cartridge, but you can also buy the rom for like $1, and there’s a demo on itch.io I’m pretty sure.

Vegas Stakes - simple casino games, perfect time-killer for the format.

Wendy Every Witch Way - concept of reversing gravity has been used in other platformers since, but this might be the OG, and is very solid.

Dragon Warrior Monsters.

I think I'm the only person who's beaten the Monster Master fight enough times to know there's a bug in it where he eventually gets strong enough that you get one shotted by him even if you're cheating and using a Gameshark to keep your health in the 1024 hp range...

Rebelstar: Tactical Command, In a nutshell it's X-COM for the gameboy advance.

I didn’t have a Gameboy, but I did have an Atari Lynx and I would say for Atari it was Batman in color.

Falling sand games, specter supreme, escape velocity, gyromite.

Great Greed!!!

Lighthearted RPG with a really neat combat system, funny writing, and food puns everywhere! So awesome and I never see anyone talk about it.

Shout out to Hungry Goriya for her excellent review on this gem.

Pac in Time was a great game, came bundle with my red original Game Boy. Turok 1 and 2 for Gameboy were loads of fun too

You know what was great and gets no love? Q*Bert for GameBoy was a really solid game that had a LOT of stage variety and even silly cutscenes. Literally the only thing it was missing was color. Highly recommend.

Quest for Camelot was a banger. I think it's in NSO actually. The sword swing sound effect is burned into my DNA.

My favorite GBA game is The Urbz: Sims in the City. The console version of the game wasn't received very positively, but the GBA/DS version is a completely separate game, and a very good one. It's a very goofy game with a lot of stupid (read: amazing) jokes, RPG elements, mini games, some of the best music in any GBA game and a lot more. I still revisit this game once in a while.

I even played the predecessor "Sims bustin out" for the GBA a few years ago. Urbz is way more refined than bustin out, but if you liked Urbz and you want more, Bustin Out is a great way to scratch that itch.

Ambitiousamphibian did a great video on this game a few months ago. He seems to feel exactly the same about this game as I do. Because of that, I will link it, but be aware that it contains a lot of spoilers and going blind into the game is the best way to play IMO.