Resident Evil Gaiden (M4 Limited/Capcom, 2001)
RE's GBC outing was a mix of top down world navigation and the weird first person combat you see above. You need to stop the red bar within the white or purple areas to hit a zombie, and those areas will get bigger each time they move closer. It's an interesting system, but it's much harder to avoid damage than in the original games, and your ammo runs out incredibly quickly.
Return of the Ninja (Act Japan/Natsume, 2001)
A ninja-themed platformer that only got average reviews at the time, but that I had a lot of fun with in the first chapter. It introduced a ton of ninja tools for use in future levels right as I stopped playing, so it should get more interesting as it keeps going. To the list!
Revalations: The Demon Slayer (Multimedia Intelligence Transfer/Atlus, 1999)
I've actually already covered this as Megami Tensei Gaiden: Last Bible because I didn't realize it had a US release. But, the rule is that I do the US release if it exists, so that means this gets to show up again. It's still an archaically-designed RPG with decent music, and I am happy to report that it was not a language barrier preventing me from getting past the tutorial section, because I still don't know what it wants me to do in English.
Rhino Rumble (Formula/Telegames, 2000)
You're this purple rhino and you need to platform through levels, because rhinos are known for jumping. You also need to shoot things with your pellets instead of ramming them, which is also a behavior rhinos are known to do. Despite Formula apparently confusing a rhino for some other animal, it's actually pretty fun since you can move so quickly. It's not going on the list because I could already see signs that it'd get harder by being unfair, but you could do much worse with GBC platformers.
Rip-Tide Racer (Cryo Interactive, 2000)
Much as I've praised GBC racing games that take from Micro Machines, this one shows that's not a magic formula for success. The tracks are so open that you can't tell where you're going some of the time, there's no sound, the AI racers get left behind after a few seconds, and some kind of physics bug makes it so hitting those big circular barriers shoots you forward at a million miles per hour.
Road Champs: BXS Stunt Biking (HotGen/Activision, 2000)
Yet another BMX game. It feels bizarrely similar to an earlier one that opened with a bunch of tutorials involving half-pipes, but I can't say for sure whether there's any relation there. What I can say is that it's boring and doesn't control well.
Road Rash (3d6 Games/Electronic Arts, 2000)
A motorcycle racing game that borrows from Outrun. That was an especially unfortunate decision in this case, because they also decided to have the track undulate in quasi-3D. This was seemingly a quest to prove that even the GBC is capable of producing motion sickness.
Roadsters (Titus Software, 2000)
Another Outrun-style game, but this one is notable for having the worst engine sounds on GBC. I know I haven't played every game yet, but I am confident no one will top the high pitched air raid siren that Titus apparently thought resembled an engine. It's horrible, and it plays constantly.
Robin Hood (Planet Interactive/Electronic Arts, 2001)
A game with deeply confused lore. Robin Hood goes on a Crusade with King Richard, which would defeat the entire point of Robin Hood as a conflict against evil King John. Then they both get captured by the Ottomans, which is rather unlikely considering they were quite busy being hundreds of years from forming an empire at the time. At any rate, it's a top down shooter I was close to saying wasn't bad, but then the floor randomly opened up beneath me and I instantly died. That's pretty crap.
RoboCop (Mirage Interactive/Titus Software, 2001)
I think this image really sums up how crap this game is. It has surprisingly good music, but there's really no redeeming it when you have to move a tiny little Robocop around a super zoomed out map to shoot at tiny little bad guys.
Golf Ou: The King of Golf
John Romero's Daikatana
Kakurenbou Battle Monster Tactics
Keitai Denju Telefang
The Legend of Zelda: Link's Awakening DX
The Legend of Zelda: Oracle of Ages
The Legend of Zelda: Oracle of Seasons
LEGO Island 2: The Brickster's Revenge
Metal Gear Solid
Millennium Winter Sports
Pokemon Crystal Version
Pokemon Card GB2 - GR Dan Sanjou!
Pokemon Puzzle Challenge
Pokemon Trading Card Game
Quest for Camelot
Return of the Ninja