Rio 40 Graus has been catching plenty of attention, so we put it through its paces to see how it really holds up. This is a Macaw Gaming game, sitting firmly in the a very high volatility profile bracket and paying back 95.21% RTP. It's built with crisp artwork and atmosphere and plays out on a 5-reel grid running 40 paylines. It first went live in 2019 and still earns its place today. The maximum win sits at 5,000x, so there's serious upside on the table. Let's break down what works and what doesn't.
Written by Daniel Chen · Last updated: February 2026
Rio 40 Graus comes to us from Macaw Gaming, built with crisp artwork and atmosphere and powered by 40 paylines across 5 reels. The result is very high variance paired with 95.21% RTP.
The mechanics are what make Rio 40 Graus interesting. Look out for scatter symbols that unlock free spins and extra bonus rounds. With very high variance, this one is aimed at players who can ride out the swings for the top wins. All told, it's a solid entry in the Macaw Gaming catalogue.
At 95.21%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Very high volatility delivers the most extreme payout profile — long dry spells punctuated by potentially massive wins. Only recommended for experienced players with substantial bankrolls and high risk tolerance.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Rio 40 Graus features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Rio 40 Graus by Macaw Gaming is a solid offering that delivers good entertainment value. The 95.21% RTP combined with very high volatility creates a well-balanced gaming experience.