The Four Inventions

The Four Inventions by EURASIAN Gaming is a video slot played on a 5-reel, 3-row layout with 25 fixed paylines. Its theme revolves around the Four Great Inventions of ancient China: the compass, gunpowder, paper, and printing, each represented by high-paying symbols drawn in rich, thematic artwork. The Yin Yang symbol serves as a wild, substituting for all ordinary symbols (but not the scatter) to help complete winning combinations. A scatter symbol triggers the free spins feature when three or more appear anywhere on the reels. In the free spins bonus round the game splits into four separate reel sets, one for each invention; each set starts with a number of spins and winning on a set can grant extra spins for that specific set. There is also a bonus buy (also known as a power feature) that allows players to purchase direct access to the bonus rounds rather than waiting for natural triggers. The max win per line is capped at 32× the line bet, with the higher-paying invention symbols offering the biggest returns. Players have the option to use a gamble feature after wins, risking their payout for a chance to double it. The game is built in HTML5, making it playable on both desktop and mobile devices.

You can try it for free in demo mode or play it for real money.