What is the V Bucks coin in Fortnite and can I only get the exact explanation in Solo mode?
You can only buy V Bucks in the shop for money. Or earn in non-Battle Royal mode. But if you play Fortnite battle royal then you can only buy them for real money.
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Either earn it via 'Save the World' or buy it in the Battle Royale Shop. You also get a few 100 V Bucks per season in the free pass.