Beamdog has already made admirable Android ports of the original Baldur's Gate RPG and its side-sequel Icewind Dale. Now you can get Baldur's Gate II, the continuation of the original that was first published way back in 2000 by none other than Bioware. Like the previous D&D RPGs, Baldur's Gate II costs ten dollars on the Play Store, which gets you the original game and all its expansion scenarios. The game is not restricted to tablets, though it will certainly be better played on one.
The core of BGII is Shadow Amn, which directly follows the story events of the original game.