For fans of the Forgotten Realms universe, the Play Store has copies of both Baldur's Gate, Baldur's Gate II, and Icewind Dale. All three of these titles sell for $10, but the last one is currently reduced down to a mere $4.14. That's a pretty impressive savings of roughly 60% and a price that would have long-time fans jumping up and down back in the day. Some of them probably still are.
This is an enhanced port of the PC title with minor alterations to make it touchable. The game remains a complex affair, so while the Play Store says you can install it on a phone, please don't. This is better suited for a tablet. Your eyes and thumbs will thank you.
And did I mention the Heart of Winter expansion comes included? Yeah, your gaming dollar goes pretty far nowadays.