The most popular online slots this week, the last week of 2021, will raise the bar on new development in 2022. NetEnt is bringing back the natural world, while ELK Studios offers big prizes, and GameArt gives players millions of chances to win.

NetEnt’s Silverback Gold offers free spins and silverback wild symbols that upgrade with huge multipliers. This is the latest in a series of gorilla-themed online slots that have been exploding at online casinos over recent months.

Silverback Gold can be volatile, and you will need to have all your courage to wait for those gorilla wilds and free spins. There is also a Buy Feature that allows you to skip right to the action in certain jurisdictions.

Mystic Orbs is the latest ELK Studios release. It’s packed with magic and mystery. You can win up to 10,000x your stake. Watch out for feature rows for bonus modifiers and trigger-free drops.

Keep an eye out for the blue orbs. The bonus game is activated when you get five of these on the reels. Bonus drops can also be earned every time you collect an orb during the bonus round. A persistent multiplier may be available that increases with each appearance of the correct symbols on the feature row.

Red Rake Gaming’s Million Zeus is now available in the mystical Orient and ancient Greece. Red Rake Gaming’s Million Zeus release is sure to please those who loved Silverback Gold’s bonus meter.

Million Zeus is played on a set of 9×6 reels. You will find regular symbols that pay and icons that are silver thunderbolts. A cascade mechanic is used to replace winning combinations that disappear.

By lighting up the BONUS letters at the top of the screen, you can also activate a free spins feature. You can win up to 20 free spins; pay attention to the special reel, which can trigger multipliers or extra spins.

Nefertiti Hyperways by GameArt allows players to travel to Egypt. This is a unique online slot that offers over 60 million ways to win. It uses a cascading-reels mechanic that makes winning combinations disappear after each spin. The symbols above will disappear for the next spin.

Nefertiti Hyperways’ beauty is its ability to control the volatility. You have the ability to control the game and change the settings depending on your performance.