Heart of Rio Slot by Pragmatic Play

Reel 5 is the engine. Money Symbols land on reels 1 through 4, each carrying a random value between 1x and 35x your total bet. They sit there doing nothing until one of five Collect symbols appears on the fifth reel. Which Collect type lands determines everything - a basic Collect just sums the values, but Multiplier Collect multiplies every Money Symbol by its printed factor first. Expanding Collect fills entire reels with new Money Symbols wherever at least one already existed. Respin Collect locks existing Money Symbols and respins the rest for a second chance. Extra Credit Collect adds its own value to each Money Symbol before totaling. Five different outcomes from the same trigger position.

The carnival setting puts samba dancers front and center. Three of them fill the premium symbol slots - the red-haired dancer in gold headgear pays highest, followed by purple and green costume variants. Toucans and macaws perch on ornate golden borders against a nighttime Rio skyline, pink feathers and fireworks filling the background. Carnival drums sit in the corners. Gold dominates the card symbols, which honestly blend into the rich visual noise a bit.

Free spins flip the Money Collect structure. Land three drum Bonus symbols on reels 2-4 and you get 8 spins where every Money Symbol value that hits gets added to a running bonus pot instead of paying immediately. After all 8 spins play out, the accumulated pot drops back onto reels 1-4 as a single oversized Money Symbol. One final respin follows - and if a Collect symbol lands on reel 5 during that last spin, the entire pot pays out. Retriggers award another 8 spins with no cap, so the pot keeps growing. But miss that final Collect and the pot is gone.