Just like on a land-based casino, it is chance that determines who wins and when. Online casino games all have a certain RTP% (Return to Player) which stands for the theoretical payout figure in a game. At the same time, RNG (Random Number Generator) is also set for all online casino games, which ensures that all winnings are 100% random and cannot be manipulated - unlike land-based pokies that can be tinkered with manually. To win real money at a casino, you need to make a deposit.