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Released in August 1981 in the USA by Rock-Ola, under license from Namco.
This game is known outside US as "Warp & Warp". Please see this entry for more information about the game.
The only difference between the new and the old version is the copyright string on the first screen (when the scores are displayed) :
* New version (set1) : '(c) 1981 ROCK-OLA MFG.CORP.'
* Old version (set2) : '(c) 1981 ROCK-OLA MFG.CO.'