Heartburst. . Legacy of the Wild 2. Heartburst. Play for free the Heartburst slot machine from Eyecon software or choose the best online casinos with Heartburst available in your country. Play for free the Heartburst slot machine from Eyecon software or choose the best online casinos with Heartburst available in your country. Heartburst is a five reel slot with four rows and up to one hundred paylines; the design is simple but pleasing to the eye with those bright. Legacy of the Wild 2. Heartburst is a five reel slot with four rows and up to one hundred paylines; the design is simple but pleasing to the eye with those bright. Heartburst is a 5-reel, line online slot game with bonus spins, instant play, autoplay, video slots, multiplier, wild symbol, scatter symbol. The games at the site are powered by Random Logic. Originally launched in , Casino has come a long way when it comes to providing online casino games.