Both these games employ match-three puzzle gameplay that has you matching three or more similar items in order to progress. It's simpler compared to the slinging of birds across a phone screen that Angry Birds is known for.
And it appears that Rovio seems to agree as well. First reported by fan site, Angry Birds Nest, the company has soft-launched two games - Angry Birds Stella POP! and Angry Birds Fight! (pictured above) in Canada and Thailand respectively, as a means of gauging user feedback prior to a full-fledged global launch.
Angry Birds Fight! has you matching birds to battle enemies quite similar to Puzzle & Dragons, while Angry Birds Stella POP! draws inspiration from Bubble Witch Saga and Bust-a-Move, having you pop bubbles to defeat the series' villainous pigs.
It marks yet another attempt from the Finnish company to have a game that matches the scale of success other free-to-play mobile titles have in recent times. Though it has recently expanded Angry Birds into non-gaming segments such as clothing and toys, it's struggled to keep up with seemingly nimbler competition in its core space - mobile games.
Rovio was most recently in the news for laying off 14 percent of its workforce, about 110 jobs, and shutting down a Finnish studio due to growth not being as positive as required.