RTP.13 on this medium volatility slot, which is pretty good if not the outright best and it is readily available to play here on the site for free before you head over to one of our reviewed casinos to playfor real money. Like their brick 'n' mortar cousins, real money online casinos promote their online slots so heavily and that's because: they're popular, they're packed with state-of-the-art features, they're profitable for the casinos, and capable of pumping out big winnings for a relatively small outlay. Summary, overall, Mayan Gold is a simple but solid game in terms of audio and animation. One last thing to note is the game history button, a useful feature, which I think real money gamblers will appreciate. Next, pick how many coins you want bet on a particular line. But how well does it manage to differentiate itself from the abundance of other games of this kind? 5-Reel Most of today's online slots are 5-reel games with 3 or 4 rows.