File this under: cool custom-built portable gaming systems. Just days after our feature, SlipStreamGT from the ModRetro forums revealed the Slipstream 64, a SEGA Game Gear-sized N64 potable. Featuring a 4.3-inch LCD display, top-loading cartridge slot, 4400mha lithium-ion battery, integrated N64 expansion pack, and relocated controller buttons. Click here for more pictures. Continue reading for two videos.