2600 (x2)
Intellivision
SMS
Genesis (x2) w/ SegaCD & 32x
Saturn
Dreamcast (x2)
Game Gear (x2)
NES (x2)
SNES (x2)
N64 (x2)
Gamecube
Wii (x2) (HBC installed)
WiiU (hacked w/ Loadiine)
PS1 (x3) (1 modchipped)
PS2 (Free McBoot)
PS3
Xbox (x2) (1 softmodded, 1 modchipped)
Xbox 360
Gameboy Color
GBA (x2)
DS Lite (x3) (CycloDS & R4 flashcarts)
3DS (CFW)
Had some additional duplicate systems but traded them off or gave them to friends/family. May trade in other duplicate hardware later on.
I have 15 of the above consoles in my entertainment center, along with a older pc.