These pages are from Mattel's 1981 Toy Fair catalog. Only the pages with handheld games are included:
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Soccer 2, Basketball
2, Hockey and Football
II. Note the description says the Hockey game is Hockey 2.
This seems like a mis-print, but in the description they specifically mention
the variations that have been
found on later versions of the Hockey game (the ability to skate behind the
goal, and the victory music
that plays when you score). There was never an official 'Hockey 2', but maybe
Mattel did differentiate
between these two versions in their printed material...