Play Primate King

Primate King is a jungle-themed slot from Red Tiger that uses a 5-reel layout that can expand to six reels through an upgrade system tied to collected coins. Along the way, wild symbols become more powerful, eventually turning sticky and carrying growing multipliers. With its lush setting and unusual progression mechanic, Primate King puts most of its focus on building towards bigger potential wins rather than relying on a traditional bonus round. 

Primate King takes players deep into a tropical jungle filled with towering trees, skulls, and hidden riches. The background isn't static either. Vines sway, leaves move in the breeze, and the whole scene feels more alive than you’d expect from online slots. A giant gorilla appears throughout the game, adding some menace to the setting and reinforcing the idea that this isn't a peaceful walk through the rainforest. 

The symbols continue the adventure theme with maps, compasses, treasure chests and snakes appearing among the standard card suits. A dark soundtrack with tribal drums and ominous tones gives the game a slightly dangerous edge that suits the theme perfectly. 

• Wild Symbol: Substitutes for all regular paying symbols. 
• Full Reel Wild: Like it says on the box, this covers an entire reel. 
• Multiplier Wild: Adds a random multiplier . 
• Sticky Multiplier Wild: Remains in place and can increase in value after consecutive winning spins. 
• Coin Symbols: Collected to unlock upgrades and eventually the sixth reel. 

Primate Upgrade 

Certain symbols land carrying small gold coins. These are collected in a meter beside the reels. Filling the meter gradually upgrades the wild symbol. 

The first upgrade turns the standard wild into a fully stacked reel wild. 

The second upgrade adds random multipliers to the full reel wild. 

The third upgrade delivers a sticky wild that can increase its multiplier after every winning spin. 

Primate Smash 

If a wild appears but doesn't create a win, the Primate Smash feature can randomly activate. The giant gorilla smashes the reels, removing low-value symbols and replacing them with premium symbols. This feature always creates a winning combination. 

Sixth Reel Unlock 

After all wild upgrades have been completed, the game permanently unlocks a sixth reel for the current stake level. This additional reel contains only premium symbols, increasing the potential for larger combinations. 

Primate King begins with a 5x4 reel setup featuring 30 paylines. Wins are formed by landing matching symbols from left to right across active paylines. 

The game's main mechanic revolves around progression, players gradually upgrade their wild symbols by collecting coins. Each improvement makes the reels more valuable, and eventually a sixth reel is added to the layout. 

The thing we like about Red Tiger is that every game it releases is different, so check out these recommendations from our online casino library: 

• Diamond Blitz is a traditional retro-style slot that adds features like moving wilds and a Blitz Spins mode. 
• Year-Round Riches Clusterbuster has a  9x9 cluster grid, cascading wins, a central Clusterbuster block, and four seasonal modifiers.  
• Sugarlicious EveryWay mixes Megaway with cluster pays, and throws in cascading wins, random multipliers, and a free spins round. 

We enjoyed how Primate King does things a little differently. There aren't any free spins or elaborate bonus rounds to wait for. Instead, the game steadily builds towards stronger wilds and an expanded reel set-up. The upgrade system gives every collected coin some importance, and unlocking the sixth reel feels like genuine progress. 

The jungle theme is also one of Red Tiger's better efforts. The setting looks fantastic, and the gorilla animations add plenty of personality. We would have liked a few more feature variations along the way, but the gradual upgrades keep things interesting. Players who enjoy games where features develop over time rather than arriving all at once should find plenty to like here.