The Slayer Rpg for Android
The action takes place in a well-drawn fantasy world. You can't choose characters, but all other aspects of RPG are present in the standard form. The player travels around the world within the limits of the game campaign, but the world is limited to settlements with neutral NPC and dungeons with monsters.
The player gets the soul of every killed mob, some of them give loots. Souls act as experience for upgrades. There is a small range of weapons and equipment. Also, there are special skills that can be upgraded as the levels grow.