Well, I believe that SEGA is the most influental Co. of all time. 1. Genesis. It was the Nintendo-killer. Before this, Nintendo seemed to be invincible with its NES. Genesis was more than on par with Nintendo's SNES, but even better. The rivalry was one of the greatest, and is, console wars ever. 2. Games. Tell me Outrun, Space Harrier, Jet Grind Radio, Sonic the Hedgehog, Rez, Virtua Fighter, Alex Kidd, NiGHTS, The House of the Dead, Virtua Cop, Shenmue, Streets Of Rage, Sega Sports 2K Series, or Virtual On weren't influental. I would call you a damn dirty liar. 3. Dreamcast. First TRULY dedicated online features in a console. Stepping stones for new online consoles 4. Sega Saturn. Only one with testicular fortitude to combat Sony's little Bit¢h, Playstation. Nintendo's N64 was just there; it never really competed with Sony. 5. Dreamcast. I reiterate to emphisize my point 3. Anon.