An awkward cross-breed time-travelling mongrel is a fairly fitting description for this mod that's jammed an Atari 2600 emulator into the shell of a Sega Game Gear. Sure, it's not the prettiest of mods, but taking the '80s-era Atari and squishing it into the '90s-era Sega took some tricky work: it has a built-in 40-game Atari chip, and can actually take 2600 carts into a slot on the back. The resulting "Atari Game 2600" has a 2.5-inch screen and can go for 7-8 hours on AA batteries, which seems pretty impressive. [Ben Heck via Technabob]