When you feel bored and have nothing to do, you are always welcome to try playing RTG free slots online. Many of the RTG free video slot games are presented at Slotopus and you may play them online at any time you wish. The Mermaid Queen slot machine free game by RTG is a fabulous game. The Mermaid Queen slot has 5 reels and 20 paylines, the number of which is controlled by the players. It replaces all symbols except the Scatter and appears only on the reels 1, 3 and 5. When Mermaids appear on their reels the free games are won. Every Clam Symbol wins additional free game, when it appears during the free spins feature. Imperial Palace is a 5-reel video slot with 20 paylines. Free spins feature is available in this game. It means that if a player has three of these symbols, the one gets the opportunity to spin the reels at the same rate absolutely free. Imperial Palace slot game also includes Wild x5 Multiplier (your win will multiply its size by 5). Heist is a 5 reel, 30 pay line 3D next generation video slot game. It offers scatter payouts, a wild reel and a bonus game where you become Neil and try to break in the vault before the cops get you. Free video slots by this developer are available at Slotopus, where you may play them for free. The Miss Kitty slot is a 5-reel slot with 50 paylines. The slot symbols are as follows: Kitty, Moon, Mouse, Milk, Fish, Clew, Bird, also letters and numbers. It appears only on the reels 2, 3, 4 and 5 and substitutes for all symbols except the Scatter. The Moon is the Scatter symbol of this game. When three Moons appear the free spins feature is activated and 10 free spins games are launched.