What Are Online Slot Games?

Online slot are games that use random number generators to determine the results of each spin. These numbers are determined by a mathematical module in the game’s software. When players press “spin”, a random number is selected, and the reels stop where they should.

Despite popular misconceptions, online slots do not cheat or rig the results. Their math is thoroughly tested and regulated by gambling regulators.


When it comes to online slots, there are thousands of different ones with a variety of themes and symbols. Each one has a specific purpose and payout rates. Generally, they offer payouts whenever a winning combination of symbols appears on the reels. They can also trigger bonus games, free spins, and jackpot features.

Typical standard symbols are those that don’t have any special function and simply pay out a certain amount of money when they appear in a row on a winning line. These can either be two or three symbols, depending on the slot game. Normally, a winning line can be made only from left to right on the reels, but some online slots like Starburst allow players to make winning lines in both directions.

Multiplier symbols are another type of special symbol that can multiply the payout of a winning combination. They usually display a multiplier value, such as x2 or x3, which is then applied to the total win.


Paylines in online slot games are lines that run across a game’s reels and can be horizontal, vertical, diagonal, or zigzag. These lines are the ones that determine whether a player wins or not. They can also vary in number and direction, and there are even slot games that have no paylines at all.

Most paylines in slot games run from left to right, but there are some that run both ways and are known as all-ways to win slots. These are less rigid and allow symbols to land anywhere on the grid, increasing a player’s chances of winning.

The pay table is a useful tool for learning about the paylines in online slots, and it will indicate how many paylines are active. It also lists the paytable’s symbols and their payouts. There is no correlation between the number of paylines and the payouts, but more paylines increase your chances of winning. Adjustable payline games have a lower minimum bet than fixed-payline games.

Bonus rounds

Online slot games that include bonus rounds offer players the opportunity to win extra prizes. These can range from free spins to jackpots, and are triggered by certain symbols in the game. These bonuses can also add a new element of entertainment to the game. Some bonus rounds are as intricate as a game within a game, and require a high level of skill to complete. For example, a player might be required to shoot down alien spaceships or steal gems from a museum security room.

Bonus rounds can increase your winning potential, but you should always play within your bankroll limits. Some bonus games can even be retriggered by lining up the same scatter or bonus symbols that launched them, but this will not continue indefinitely. Additionally, you should be aware of the hit frequency of these games before deciding whether or not to play them. Generally, the higher the hit frequency, the more likely you are to trigger them.


RTP is the percentage of your total session bet that a slot machine will pay back on average. It is calculated by developers based on the results of millions of simulated spins. Your personal RTP may be higher or lower than the assigned average.

The RTP of online slots is often much higher than those of land-based casinos, which have physical limitations and must make a profit from a limited number of machines. This difference is not due to brick-and-mortar conspiracy; instead, it’s because online casinos are able to offer more games and can afford to invest in research and development.

It’s important to understand the nuances of RTP before you begin playing slot machines. A good place to start is by checking the game’s volatility. High-volatility slots tend to pay out larger, but less frequent amounts, while low-volatility slots offer smaller wins more frequently. This information can be found on a game’s payout page or in the information tab if the slot is in an online casino.