Play Bio Senshi Dan - Increaser Tono Tatakai (Japan) Online

Okay, so Bio Senshi Dan is one of those NES games that somehow slipped past most of us outside Japan—which is a shame, because it’s this weird, awesome mix of Mega Man jumps and Kamen Rider vibes. You play as Bio Dan, a cyborg dude with a grudge against the Increaser Empire, and yeah, the name’s ridiculous, but the gameplay? Surprisingly solid.

The coolest part is the armor swaps—you’re not stuck with one moveset. One form’s got a rapid-fire gun, another hits like a truck but moves slow, and figuring out when to switch mid-stage feels way more tactical than I expected. The levels throw some mean enemy patterns at you, though. Like, NES-hard mean. But nailing a tough section after a few tries? Pure satisfaction.

Visually, it’s got that chunky, colorful ’80s sci-fi look—think glowing circuits and robots that explode into pixel sparks. Not gonna lie, the soundtrack’s a banger too. If you’re into deep-cut action games with a side of transformation gimmicks, this one’s a blast once you get the hang of it.