You probably know Hexage. This developer has been a part of the Android gaming landscape since the beginning with titles like Radiant, EVAC, and Robotek. Hexage's newest title is the 2D action RPG Reaper, and it looks amazing.
This game takes the essence of an RPG and distills it to work effortlessly on a mobile device. There aren't a plethora of buttons all over the screen, just left and right controls and a gesture area for attacks and jumps. You travel around the map, taking on quests and fighting baddies, all the time collecting gold to buy more gear.
As with some of Hexage's recent titles, there are in-app purchases, but they probably don't work like you expect. You can play through part of the game for free, but it costs $2.99 to unlock the whole thing. However, there are other versions of the game (for $3.99 and $4.99) which can be unlocked with more content and free items. It's kind of like buying the collector's edition of a PC game.
Reaper has lovely, whimsical graphics. The trademark lighting effects common to Hexage games are on display, but the character models and environments seem just a little more refined than in previous titles. It's free to try, so take a look.