Man, this one takes me back—Yu-Gi-Oh! Duel Monsters 4 on the Game Boy Color was my jam back in the day. It’s Japan-only, so if you’re playing it now, you’re either emulating or rocking an import copy (respect). The deck-building here is way more focused than the later games—you start with Yugi’s classic cards like Dark Magician and Kuriboh, but the real fun is hunting down rare drops from duelists. The pixel art for the monsters is surprisingly clean for a GBC game, and the duels feel faster than the clunky PS1 versions.

Fair warning: the AI cheats sometimes. Like, badly. You’ll swear the CPU top-decks Mirror Force exactly when it needs to. But there’s something weirdly addictive about grinding for that one card to complete your combo, even if the translation patches are a bit rough. If you’re into old-school Yu-Gi-Oh! before it got bloated with a million mechanics, this is a solid time capsule.