When playing slots, one of the most important factors to consider is the return to player (RTP) percentage. This determines how much money the slot pays back over an extended period of play. While no slots have an RTP of 100%, some games have higher payout rates than others. In this article, we’ll explore which slots tend to have the highest RTPs.

Class II vs Class III Slots

There are two main classes of slot machines at most gaming websites, like Zet Online Casino:

Class II

Class II slots are based on bingo or pull-tab games. They tend to have lower RTPs, often around 80%. Class II slots are also less regulated than other slot machines.

Class III

Class III slots are more advanced slots that offer better graphics, more features and a more immersive experience. These slots have higher RTPs on average, ranging from 92-98%. Class III slots are also more strictly regulated than other slot types.

So if you want to play slots with the highest RTPs, Class III games are generally your best option. Their more sophisticated design and tighter regulation result in better payout rates.

High vs Low Variance Slots

Another factor that impacts return rates is a slot’s variance:

Low Variance Slots

Low variance slots deliver smaller but more frequent payouts. They come with less risk, since you tend to win something back regularly. Average RTP rates for low variance slots range from 95-96%.

High Variance Slots

High variance slots deliver larger but less frequent payouts. There is more risk and volatility involved, as you may experience longer dry spells between wins. But the wins tend to be bigger when they hit. RTP rates for high variance slots average 96-98%.

So high variance slot games have higher potential returns. But you need to be willing to accept the bigger swings between jackpots and losses.

Individual Slots with the Highest RTPs

Now let’s look at some specific slot games known for having exceptionally high RTP rates:

Blood Suckers II (98%)

This vampire-themed slot from NetEnt is one of the highest RTP slots on the market. It has 25 paylines and offers a free spins bonus round along with two different bonus games that can result in big payouts.

1429 Uncharted Seas (98.6%)

With an RTP of 98.6%, 1429 Uncharted Seas is one of the most generous slots available. This seafaring slot by Thunderkick has expanding wild symbols across its 25 paylines. It also features a bonus game with up to 30 free spins and a 3x multiplier.

Mega Joker (up to 99%)

Mega Joker is a classic fruit machine slot by NetEnt. In the basic game it has an RTP of 76%. But when you activate the Supermeter mode, RTP jumps to 99% – the highest of any slot. Just keep in mind Supermeter requires doubling your bet.

Finding Other High RTP Slots

The slots above have some of the highest published return rates around. But here are tips for finding other games with strong RTP percentages:

• Play new slot releases – New slots often have inflated RTPs to attract players.
• Try slots from certain providers – NetEnt and Thunderkick in particular are known for high 96%+ RTP slots.
• Check slot RTP info sites – Many websites publish return percentages for slot games at online casinos.
• Use loyalty and VIP programs – Members get access to exclusive high RTP slot options.
• Focus on slots with bonus features – Games with free spins and bonus rounds tend to have better payout rates.

So while high variance Class III slots boast some of the best RTPs, you can find loose, player-friendly games by researching reputable providers, using loyalty programs and targeting bonus feature-packed slots. With the right approach, the house edge can be under 2% on some machines.