40. Tetris 2 (GB)

This time it’s personal. A sequel to the system-selling puzzler was an absolute given, of course, and looking back on Tetris 2 all these years later, it’s admirable just how much of a departure it was from the original classic. Named Tetris Flash in Japan, it takes the basic falling-blocks gameplay but adds in a match-three element with irregularly-shaped tetrominoes. It’s jarring at first if disappearing horizontal lines are burnt into your brain, but give it time and you’ll find a surprisingly addictive little puzzle game in its own right.

39. Balloon Kid (GB)

Sequel to the NES game Balloon Fight, Balloon Kid isn't without its charms, but those charms are undeniably superficial: the graphics are nice and the music is fun, and the nods to Balloon Fight are all worth a smile, but there’s not a huge amount of depth. That said, it nails the mechanics of the original game and expands on its endlessly replayable Balloon Trip mode, making it ideally suited as a portable experience.

38. Kid Icarus: Of Myths and Monsters (GB)

If you're a fan of Kid Icarus on the NES, you owe it to yourself to pick up the sequel. Not only does it capture the same magic found in the NES release, but it builds on many of the great gameplay ideas featured in the original. The difficulty has been toned down to make it a bit more approachable, but there's still plenty of challenge to be found and a fairly lengthy adventure. Some fantastic boss fights make for particular highlights, and Kid Icarus: Of Myths & Monsters is a great prelude to Kid Icarus: Uprising.

37. Game & Watch Gallery (GB)

The Game Boy was, in many ways, the natural evolution of Nintendo’s Game & Watch line of one-shot portable devices, so the ability to play those games on one cartridge seemed like an acknowledgement of that handheld legacy. If you liked the originals, this collection is a must-have. Both the originals and remakes, which combine simple gameplay and subtle strategy, are here to enjoy and the newer versions play differently enough that you're quite likely to consider them new experiences in and of themselves. The musical and visual presentation is fantastic as well, and the entire package serves as a relic of a truly magical time in gaming. Or, perhaps, two truly magical times.

36. Tiny Toon Adventures: Babs' Big Break (GB)

A fabulous portable cartoon platformer, Tiny Toon Adventures: Babs' Big Break is another example of a fine licenced game with excellent audio and solid visuals on the Game Boy. The charm of Tiny Toons might be the thing that grabs your attention, but the gameplay is remarkably good and Konami once again demonstrates why we’re so sad they don’t really make video games any more. Looney, indeed.

35. Operation C (GB)

This is without a doubt a Contra game (or Probotector if you’re a robot-loving European) more worthy of its title than, say, certain PlayStation entries. It hits on most of the aspects that make a good entry: challenging gameplay, tight controls, varied enemies, killer arsenal, macho tunes, big bosses. For a title two years into the mighty portable’s lifespan, it accomplishes an impressive amount in shrinking the essentials of the beloved console/arcade series. Sadly, players are forced to go gung-ho solo, which is disheartening for multiplayer fans and kills some of its longevity, but it’s remarkable just how well the game holds up on the humble Game Boy and fans of the NES games would foolish to pass this up.

34. Kirby's Pinball Land (GB)

Kirby's Pinball Land isn’t everybody’s cup of tea, but it serves up a solid game of digital pinball starring everyone’s favourite pink amorphous ball. It's an experiment that didn't quite come together properly, but it's not without merit and its engine would be used again in Pokémon Pinball for the Game Boy Color. Kirby and pinball seem like a match made in heaven; this isn't quite that, but it’s a fun little mashup that showcased the potential for future Nintendo X pinball crossovers involving Pocket Monsters and intergalactic bounty hunters.

33. Dr. Mario (GB)

The Game Boy port of this pill-dropping puzzler offers a decent game, although it probably isn't top of the must-have puzzler list. Unlike Tetris, where the colours of the blocks are irrelevant, Dr. Mario’s pills are a little more challenging to keep track of, especially on the original system’s blurry screen. Still, if you’re a prolific puzzle practitioner, you could do much worse than this falling-block title with a twist.

32. Batman: The Video Game (GB)

The game may have a fairly basic appearance as a result of being released in the early years of the handheld's life, but Sunsoft managed to add some variety to the locations and the gun-toting Batman sprite is amusing in its own way. The game gets tougher later on but it doesn't feel overwhelming, and the Batwing levels are a great addition to the excellent platforming action found in the rest of the game. Overall, Batman: The Video Game on Game Boy is a decent facsimile of its bigger brother on NES and still a lot of fun to play through.

31. Catrap (GB)

Something of hidden gem in the Game Boy catalogue, Catrap is a platform puzzler credited with being the first game to have a ‘rewind’ feature. You’re tasked with defeating monsters in order to escape 100 levels of ladders, blocks and other objects. Stages get more and more devious, of course, and a level editor enables you to create your own. If it looks a little basic from the outside, the game has a giant amount of content and could keep you busy for weeks. It was arguably overlooked back in the day, but it’s an innovative puzzler that deserves a bit of attention.