B60xx 4-digit games are the same as B6000 except for finishing the same function. The main difference is that B60xx games are labelled with Rockwell numbers on the plastic package, for example the "BLK-36000" label on the package indicates which Rockwell part it is. B60xx games are never marked as "Special or Game", but B6000/B61xx versions are marked as "S+G" or just "G" depending on the game. B6000/LPLR uses a different Rockwell part, namely the B6000 part, and is otherwise a mirror image of B6000/LPLR-1.
B61xx games are used in Mattel games such as "Tick-Tick-Toe" (base game), "Head-Head-Toe", "Tape Race" (base game), "Doctor's Office", "Sensible Soccer", "Columbus in the Sky" and "Olympic Hockey." Some games also use B61xx parts, namely "The Party Game" (base game), and "Sensible Soccer".
B6100 is used in all versions of Space Alert, although games might meld B6000/LPLR and B6000/LPLR-1 parts with the B6100 part. But the B6100 in B6000/LPLR and B6000/LPLR-1 is very different than in other games and could be used in something else. Space Alert was the most popular Mattel game in the mid 80s. The original Space Alert was released in 1982, and the number of purchasable game licenses was tightly controlled. As such, Mattel effectively sold the game for a standard retail price of $60 in a package known as the "Repack." If a user paid up to five times the retail price, they could get 10 of the same game. But only a limited number of licenses were sold to this pre-paid plan, and by the end of 1982, Mattel had reportedly sold 7,000 Repack packages. d2c66b5586