Play Mario 15 (SMB1 Hack) Online

Game Overview

Mario 15 (SMB1 Hack) is exactly what it sounds like—a hacked version of the original Super Mario Bros., but with enough changes to make it feel fresh. The first thing you notice is the altered sprites—some enemies look weirdly stretched, others have colors that don't quite fit, and it gives the whole thing a slightly off-kilter vibe.

The level layouts are where it gets interesting. You'll recognize the basic mechanics, but the jumps feel tighter, the enemy placements more punishing. There's one early stage where a row of piranha plants pops up right where you'd normally land, which made me laugh before I died to it twice.

It's not a full overhaul, but if you've played the original to death, Mario 15 (SMB1 Hack) throws in just enough surprises to keep you on your toes.