In short
The exact number of GM HydroGen4 built between 2008 and 2010 is not known: it falls in the “Fewer than 500 made” band.
In Car Card Game it is a Legendary card, like 660 of the game’s 6,170 cards. Among the 87 Opel cards, it ranks #3 from rarest to most common.
To get it, open the game’s free boosters: one every 4 hours, no sign-up needed.
Frequently asked questions
›How many GM HydroGen4 were made?
The exact number of GM HydroGen4 built between 2008 and 2010 is not known: it falls in the “Fewer than 500 made” band.
›How rare is the GM HydroGen4 card?
In Car Card Game it is a Legendary card, like 660 of the game’s 6,170 cards. Among the 87 Opel cards, it ranks #3 from rarest to most common.
›How do I get the GM HydroGen4 card?
To get it, open the game’s free boosters: one every 4 hours, no sign-up needed.
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