Original 12 (no insert line) carts_2

10 of the earliest games released for the Intellivision came with carts that had heavy shielded PCBs. These included 9 of the games that had full color manuals (all except Space Battle) as well as NASL Soccer. 12 of the earliest game releases had unique cartridge shells that lacked the "Insert to this line" indicator that was later added to the Mattel Intellivision cartridge shells. These included all of the games that had full color manuals and/or heavy shielding as well as NHL Hockey.