The heart is the wild symbol, it can substitute for all the other symbols, except the scatter symbol, to help and form winning combinations.
The scatter symbol is the Grease logo and it is key to one of the main bonus features.
On any spin the Sweetheart Wild Symbols Feature may be triggered and between five and eight extra wilds will be added to the reels to help you form loads of wins. Best of all, when it triggers, you are guaranteed a stacked wild.
If Danny, Sandy, or the Danny and Sandy symbol fills the first reel then the Rockin’ and a Rollin’ Respins feature begins. The reels will respin for free three times, and during the spins all wild symbols will lock into place. Furthermore, if the feature was triggered by Sandy then all Sandy symbols will lock, if it was triggered by Danny then all Danny symbols will lock, and if it was triggered by the Danny and Sandy combo then all three symbols will lock in place.
Landing the scatter symbol on reels one, three and five simultaneously triggers the Jukebox Bonus. You are given the choice of three bonus games: the Better Shape Up Free Games, the Summer Nights Free Games, and the Rydell High Bonus.
The Better Shape Up Free Games awards 12 free spins with only the high paying symbols and wilds on the reels. Furthermore, all the Danny and Sandy symbols are transformed into combo symbols.
The Summer Nights Free Games awards you four free spins. On each spin, wild symbols will fall from above and between five and eight of them will stick to the reels, including a guaranteed stacked wild.
The Rydell High Bonus is a picking game where you need to choose photos from the school yearbook to win cash prizes. There are five levels to the game and if you are lucky, you can reveal ‘Win All’ and collect all the prizes in that level.
Grease gives you the chance to win two progressive jackpots, Danny’s Jackpot and Sandy’s Jackpot. The jackpot game can be triggered after any spin of the reels, regardless of what symbols land. In the game, you need to pick from Grease logos until you find three Danny symbols or three Sandy symbols. You then win the corresponding jackpot. The slot also offers a top fixed payout of 1,000x for landing five wilds along a payline.