MegaMan Battle Network 4 Red Sun is one of those GBA gems that still holds up. You're basically diving into a mix of real-time strategy and RPG—controlling Lan and his NetNavi MegaMan in both the real world and cyberspace. The battles are frantic, grid-based affairs where you're slinging chips and dodging attacks, and the whole "customize your folder" thing gives it this weirdly addictive deck-building feel.

Red Sun's got its own quirks compared to Blue Moon (the other version), with exclusive chips and different boss fights. The story's a little all over the place—typical Battle Network stuff—but the core gameplay loop of jacking in, fighting viruses, and hunting down rare chips is as satisfying as ever. If you're into retro RPGs with a twist, this one's worth dusting off.