Immortal 5

Immortal 5 by Relaxgaming is a 5-reel, 5-row video slot with 15 fixed paylines set against a futuristic, superhero-style metropolis where five vigilante guardians defend the night. In the base game there are two standout features: the Immortal 5 Wild Feature, which can activate at random and transform from one up to all five reels into expanding Hero Wilds carrying multipliers between 2x and 100x, and the Immortal Respins feature, where landing one or more Immortal Wilds locks them in place and respins the remaining reels; any new Immortal Wilds during respins lock as well and trigger more respins until none appear. There are two Free Spins bonus rounds: the Silver Bonus and the Gold Bonus. Both are triggered by landing three respective scatter symbols on the third, fourth and fifth reels, and both award six free spins and allow you to choose between two Hero Modes—one with a progressive global multiplier and one with position-based multipliers that double upon wins and are collected by Hero Wilds. Before free spins begin you pick Power-Ups: in Silver Bonus you get two standard picks; in Gold Bonus you get three standard picks plus one Super Power-Up, which might include extra free spins, turning a reel into a Hero Wild from the start, or converting symbols into wilds. Players also have Hero Bet options (multiplying the stake by 1.5× or 5×) to boost chances of triggering features or wilds, and there is a Feature Buy system that lets you purchase entry into the Silver or Gold Bonus for 100× the bet or a Hero Spin for 500× the bet, the latter offering a chance to hit the maximum win or nothing. The maximum win possible is 10,000× the stake.

You can play it for real money.