Quell: Memento, coming to Vita, Android, and iOS, has a long lineage. "You see, the game prototype was originally created on an Amstrad CPC computer, way back in 1993," writes Fallen Tree Games art director Lewis Boadle on the PlayStation Blog. "Having said that, it was very different back then – it was called "Last of the Smileys" and was a lot more 8-bit in style."
Since that Amstrad prototype, the Quell series has grown, with two other games on mobile platforms. Memento is a series of 150-plus puzzles set in an abandoned house, in which you slide a raindrop to collect pearls, navigating other obstacles with various idiosyncratic properties. The elements are, in general, recognizable real-world things. "This would mean, we felt, that the player is able to establish the rules of play quickly, because they know that a pearl is valuable, or that a thorn will likely burst a droplet," Boadle says.