The yearly religious event formally named Carnival in Rio de Janeiro—named after its Brazilian city’s venue; held between Februarys and Aprils—inspired the celebratory August 2018 video slot Rio Riches – Stacked Up.

Its developer Ainsworth has similar games, including: Vegas Fiesta Grand (May 2022), Light ‘Em Up (August 2916), and Flamenco Riches. Themes: performing arts, carnival, Brazilian culture, festivity, ornaments, and musical instruments.

Rio Riches – Stacked Up has: win multiplier, bonus re-spin’s locked reels, stacked beaches, nine total bets, potentially scatter-turned-wilds, reel-tall “wild” queens, wild reels, fifteen symbols, two substitutes, rightward combinations, free games, elongating grid, 30 basic fixed lines, sets of extra free games that unlock up to +60 winning ways, 90 maximal win lines, and five non-progressive jackpots.

Regular games: five symbols (A, mask, toucan, drum, and necklace) pay from X0.06̅ to X2 for a two-of-a-kind to five-of-a-kind; and seven symbols (“Stacked Up”, realistic beach, K, Q, J, 9, and 10) pay from X0.06̅ to X50 for a three-of-a-kind to a five-of-a-kind.

Free games: thirteen symbols (carnival queen, “Stacked Up”, mask, necklace, rhumba shakers, toucan, drum, A, K, Q, J, 9, and 10) pay from X0.06̅ to X10 for a three, four or five winning combinations.

Rio Riches – Stacked Up Game Characteristics

Rio Riches – Stacked Up has a dynamic and frameless 5X3 grid, with red-lined and off-white standalone reels. The purple lingerie-wearing carnival queen on the grid’s margins aside; its colorful background showcases vibrant scenes from an ongoing carnival event in Rio de Janeiro.

Rio Riches – Stacked Up’s coins: $0.03, $0.06, $0.12, $0.18, $0.24, $0.36, $0.60, $0.90, and $1.20. Total bets (X30 bet factor): $0.90 (minimum bet), $1.80, $3.60, $5.40, $7.20, $10.80, $18.00, $27.00, and $36.00 (maximum bet).

Rio Riches – Stacked Up’s three special symbols: the game’s substitute is a purple-clad “wild” carnival queen; the free spins-activating scatter is a blue-and-orange “Stacked Up”; and the second substituting wild is a wins-multiplying golden beach—instead of the ordinary beach only.

Twelve ordinary symbols: purple Venetian mask; an emerald-and-golden plastron necklaces; colorful rhumba shakers; toucan; colorful drum; realistic tropical beach; and gem-embedded purple A, orange K, golden Q, blue J, green 9, and red 10.

Here are the Rio Riches – Stacked Up’s payouts.
$0.90: realistic beaches pay $0.06, $0.15, and $0.30; 9/10/J pay $0.06, $0.15, and $0.90; K/Q pay $0.09, $0.18, and $1.20; “Stacked Up” pay $2.70, $9.00, and $45.00; A/masks pay $0.06, $0.15, $0.21, and $1.50; and toucans/drums/necklaces pay $0.09, $0.15, $0.24, and $1.80.

$1.80: beaches pay $0.12, $0.30, and $0.60; 9/10/J pay $0.12, $0.30, and $1.80; K/Q pay $0.18, $0.36, and $2.40; “Stacked Up” pay $5.40, $18.00, and $90.00; A/masks pay $0.12, $0.30, $0.42, and $3.00; and toucans/drums/necklaces pay $0.18, $0.30, $0.48, and $3.60.

$3.60: beaches pay $0.24, $0.60, and $1.20; 9/10/J pay $0.24, $0.60, and $3.60; K/Q pay $0.36, $0.72, and $4.80; “Stacked Up” pay $10.80, $36.00, and $180.00; A/masks pay $0.24, $0.60, $0.84, and $6.00; and toucans/drums/necklaces pay $0.36, $0.60, $0.96, and $7.20.

$5.40: beaches pay $0.36, $0.90, and $1.80; 9/10/J pay $0.36, $0.90, and $5.40; K/Q pay $0.54, $1.08, and $7.20; “Stacked Up” pay $16.20, $54.00, and $270.00; A/masks pay $0.36, $0.90, $1.26, and $9.00; and toucans/drums/necklaces pay $0.54, $0.90, $1.44, and $10.80.

$7.20: beaches pay $0.48, $1.20, and $2.40; 9/10/J pay $0.48, $1.20, and $7.20; K/Q pay $0.72, $1.44, and $9.60; “Stacked Up” pay $21.60, $72.00, and $360.00; A/masks pay $0.48, $1.20, $1.68, and $12.00; and toucans/drums/necklaces pay $0.72, $1.20, $1.92, and $14.40.

$10.80: beaches pay $0.72, $1.80, and $3.60; 9/10/J pay $0.72, $1.80, and $10.80; K/Q pay $1.08, $2.16, and $14.40; “Stacked Up” pay $32.40, $108.00, and $540.00; A/masks pay $0.72, $1.80, $2.52, and $18.00; and toucans/drums/necklaces pay $1.08, $1.80, $2.88, and $21.60.

$18.00: beaches pay $1.20, $3.00, and $6.00; 9/10/J pay $1.20, $3.00, and $18.00; K/Q pay $1.80, $3.60, and $24.00; “Stacked Up” pay $54.00, $180.00, and $900.00; A/masks pay $1.20, $3.00, $4.20, and $30.00; and toucans/drums/necklaces pay $1.80, $3.00, $4.80, and $36.00.

$27.00: beaches pay $1.80, $4.50, and $9.00; 9/10/J pay $1.80, $4.50, and $27.00; K/Q pay $2.70, $5.40, and $36.00; “Stacked Up” pay $81.00, $270.00, and $1350.00; A/masks pay $1.80, $4.50, $6.30, and $45.00; and toucans/drums/necklaces pay $2.70, $4.50, $7.20, and $54.00.

$36.00: beaches pay $2.40, $6.00, and $12.00; 9/10/J pay $2.40, $6.00, and $36.00; K/Q pay $3.60, $7.20, and $48.00; “Stacked Up” pay $108.00, $360.00, and $1800.00; A/masks pay $2.40, $6.00, $8.40, and $60.00; and toucans/drums/necklaces pay $3.60, $6.00, $9.60, and $72.00.

In the free games: 9/10/J pay X0.06̅, X0.1, and X0.16̅; K/Q pay X0.06̅, X0.1, and X0.26̅; A/rhumba shakers pay X0.06̅, X0.13̅, and X0.3̅; masks pay X0.1, X0.16̅, and X0.36̅; toucans/drums pay X0.13̅, X0.2, and X0.4; necklaces pay X0.16̅, X0.26̅, and X0.5; wild queens pay X0.3̅, X0.5, and X1.6̅; and “Stacked Up” pay X1, X2, and X10.

The golden beach is a wins-doubling substitute—in middle reels only—after replacing the ordinary beach. 3+ “Stacked Up” offer ten free games (set in a nightly cityscape), with potentially Stacked Up-turned-wilds and wild reels. In the free mode, 3+ re-appearing “Stacked Up” offer extra free spins and progressively unlocked additional winning ways as follows.

The first batch of 3+ re-landing “Stacked Up” unlock +5 free spins, with +30 winning ways (now totaling 60 lines; a two stacked grids). The second batch 3+ re-landing “Stacked Up” unlock +2 free spins, with yet another +30 winning ways (now totaling 90 lines; three stacked grids). Subsequent batches of +3 re-appearing “Stacked Up” offer +2 free spins only.

The ordinary beach may entirely repopulate (and subsequently lock, including any other beach-filled reel) the first two reels, prompting the remaining reels (excluding other reel-filled reels) to re-spin independently once. The bonus re-spin yields a: $30.00 mini jackpot; $60.00 minor jackpot; $1200.00 maxi jackpot; $1500.00 major jackpot; and $15000.00 grand jackpot.

The Rio Riches – Stacked Up software: bet history; HTML5 technology; mobile/desktop versions; and 10/25/50/75/100 auto games, with $0.90 to $3600.00 loss limits and $18.00 to $612000.00 single win limits.

Sound effects: retro, clinking, whooshing, ringing, and rattling shakers. The animated 3D graphics: flashing, swaying carnival queens, sunburst, glittering, gushing coins, glowing, luminosity, and kinetic typography.

Luck in Rio Riches – Stacked Up

Rio Riches – Stacked Up is a game of chance. RTP rate: 94.08%. House edge: 5.92%.