Five different club magazines appeared in the early 80's: Odyssey Adventure (US), Club G7000 (UK), Commander ROM (Germany), Club G7000 Videospiele (Austria) and Odyssey Aventura (Brazil).
Here are the pictures of the magazines that I currently
Odyssey Adventure (US):
Odyssey Adventure magazine, winter, spring and fall 1982
More info on ozyr's site.
Commander ROM (Germany):
Commander ROM magazines, 1-84 and 2-84
Club G7000 (UK):
Only one of this magazines in my collection: number 5
Odyssey Aventura: No magazines yet.
More info in this brazilian site.
Club G7000 Videospiele: No magazines yet.
More info in Classic Consoles Center site.
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