Name the game systems.

Left top shelf: ???, XBox 360, what looks like a slimline PlayStation 2, what might be a PC Engine (or a bunch of cartridges), and a Mega Drive/Genesis.

Left third shelf: PC-FX, some kind of arcade joystick gamepad, a box of parts, and… is that a Wii?

Left bottom shelf: I think it's a NES (well, technically Famicom).

Right top shelf: I'd guess a Super Famicom if the shape weren't all wrong; maybe a 3DO? It's a Saturn, and probably a Playstation 3.

Right bottom shelf: GameCube (I think; wrong number of controller ports), and… could be a Dreamcast.

I'm going to go turn in my geek card now.