They are games that have a progressive jackpots attached to them, and at Royal Vegas Online Casino, that doesn't only mean online slots. Most of them have the potential value for each jackpot increases every time somebody plays. Some of the jackpot totals for online progressive slots rise to astronomical amounts and have paid out millions in a short space of time. The common feature that all jackpot games share is the jackpot meter, which shows the current value of the jackpot and subsequently increases as people place their bets. It’s important to note that most progressive jackpots are won in the currency that you’re playing in, and therefore the amount may differ from what’s advertised.