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The Diamond Casino Heist offers by far the biggest payout of all of the game's heists, but just how big depends on what is in the target vault.

1. Diamond Casino Heist -R$10 million. The Diamond Casino Heist is the most profitable but also the most demanding heist in GTA V as it requires at least two players and meticulous planning. To carry out this heist, players need to purchase an Arcade from Lester through the Maze Bank Foreclosures website.