For some, online gambling is a science. It’s not as much about amusement and a hope of winning as it is a series of mathematical formulas and calculating odds. Online casinos already typically boast higher payouts, simply because they don’t have the overhead that land-based casinos do. However, if your focus is on securing the top payout, there are a few methods. To prove that they are operating honestly, casinos occasionally publish data related to prizes and cash that has been awarded. When trying to secure the highest payouts, this data can be used to see which casinos have recently paid out the most and also which of their games or machines have recently made people big winners. Although online slots will always be a game of chance, you can seek out the loosest slot games or the loosest casinos, in hopes the data will hold true for you. Additionally, you can consider which games are already programmed to have a high return-to-player or RTP. This percentage will tell you what the slot is designed to pay back to players over the lifespan of the machine. This time around, we’ll take a look at some of the slots that have high RTPs. Mega Joker Mega Joker boasts a 99-percent RTP. That means, in theory, players should receive back 99 cents for every dollar spent on the game. This is by far, the highest paying slot noted in the industry. It was designed by the casino software giant, NetEnt, and is a traditional fruit variety. It has 3 reels and 5 paylines, which also makes it very basic. Players have the ability to activate a second set of reels, though the progressive jackpot is only available if you hit three jokers using only the primary set. To date, the largest win on this game was 105,000 euros, collected by a player on Unibet. Jackpot 6000 Another great game created by Net Entertainment (NetEnt), Jackpot6000, has the second-highest RTP on this list. At 98.8-percent, players are much more likely to walk away with some cash. Like Mega Joker, it features 3 reels and 5 paylines. It’s fairly basic, though allows for two sets of reels with mystery rounds and also has a progressive jackpot. Ugga Bugga It’s difficult to pinpoint the true RTP of Ugga Bugga. Some sites list it as over 99-percent, while others place it at 98.7-percent. Either way, it certainly deserves to be mentioned. Designed by Playtech, it features an African theme with icons such as masks, huts and drums. It has 3 reels and 10 paylines, plus a unique “hold” feature that allows players to keep certain icons on screen. Cosmic Quest: Episode 2 Created by a company called Rival Gaming, Comic Quest: Episode 2 Mystery Planets, has an RTP of over 98-percent. It features five reels and 20 paylines, plus a very unique theme. It’s based on a first-person shooter game and the jetpack icon can net players 10, 25, or even 50, bonus spins. Devil’s Delight NetEnt takes the fifth spot on the list as well, with a video slot called Devil’s Delight. It holds a solid 97.7-percent RTP, well above the online high/standard that generally sits around 95-percent. It’s a little more complex than others, and has 5 reels, plus 20 paylines. As the name indicates, it features an underworld theme and is based on the seven deadly sins, though is remarkably light-hearted despite it. Other High Paying Online Slot The number of online slots with RTPs above 97-percent makes it too difficult to list them all. However, some of the more notable ones include: Kings of Chicago, by NetEnt, with an RTP of 97.8 Texas Tea and Enchanted Unicorn, both by IGT, with RTPs of over 97-percent Jack Hammer, by NetEnt, with an RTP of 97.1-percent Lucky Lady's Charm, by Novomatic, with an RTP of 97.1-percent Generally, each software firm sets the return-to-player percent as they design the software and the number will remain the same regardless of where the game is played. However, Realtime Gaming (RTG) allows each online casino to set their own RTP, so depending on which one you visit, you may have very good odds as well. It’s also worth adding that these numbers aren’t etched in stone. They typically remain static, but the companies that create and manage them can, and sometimes do, change things up. You may also find other slots with remarkably high RTPs on your favorite site that aren’t listed here, so feel free to share your picks with others. Additionally, some of the games require a degree of skill and not just luck. An average player might have a lesser chance of winning. For this reason, it’s always a good idea to check the rules of each game on every site and play a free version first, whenever possible.