What RTP means
RTP, return to player, is the share of all bets a game pays back over a very large number of rounds. A 99% RTP means 99 of every 100 wagered comes back to players over time; the other 1% is the house edge.
RTP says nothing about a single session: short runs can be far above or below it. It is the best way to compare games over the long run.
Questions
Which game has the highest RTP?
Blackjack, at 99.5% with good play. Most of our originals come next at 99%.
Does a high RTP mean I will win?
No. RTP is a long-run average. Any single session can end up or down, whatever the RTP.