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Upgrade Fever by Games Inc is a five-reel, three-row video slot with 20 win lines in the base game and 40 win lines during the Free Spin Fever feature. The slot uses high-volatility gameplay and reports an RTP of 96.36%. The visible design follows a retro fruit-machine style with classic symbols such as cherries, lemons, plums, grapes, bells, diamonds, and BAR icons.
The main mechanic is the Wild Luck meter. When wilds land in the base game, they add to this meter and can trigger the Wild Upgrade feature if three or more wilds appear in view. During Wild Upgrade, wild symbols become stacked wilds and award re-spins while luck remains in the meter. Each spin reduces the meter, and the feature ends when it reaches zero.
Free Spin Fever is activated when three or more scatter symbols appear anywhere on the reels. The feature uses a progressive structure, with more scatters leading to more free spins. This demo version lets players play for free and practice before playing for real money.
