1. Super Meat Boy
This hardcore 2D platformer is immaculate when you play as the titular cube of meat--but Team Meat knows that variety is the spice of life, so they added a massive lineup of indie guest stars. All of them feel completely distinct from one another, many moving with new mechanics that perfectly mimic their game of origin. And secret Warp Zones tied to character unlocks feel like part tutorial, part homage with their brilliant presentation that simulates the source material. Some picks go deep into the indie well--heroes like Ogmo (Jumper), Flywrench (Flywrench), and Jill (Mighty Jill Off) could all be considered Original Gangstas of the indie gaming scene.
As if these inclusions weren't impressive enough, Team Meat included even more cameos when SMB was ported to PC, swapping in familiar PC-centric faces like Minecraft's Mr. Steve, Aquaria mermaid Naija, and the iconic Half-Life Headcrab. Oh, and we haven't even covered Flash cameos like Mr. Karoshi, Newgrounds' Pico, and Time Fcuk's Steven. As far as we can tell, Team Meat was the first to unite this many indie heroes under one digital roof, paving the way for a generation of indie crossovers.