Supercell ordered to pay $8.5M for infringing Gree's patents

--- ...this case centred around five of Gree's patents, which protected:

1. A method to improve the usability of city-building games using templates to define the positions of one or more in-game contents that can be applied to in-game areas based on the commands of the player.

2. A server and method for transferring an object between two users, as well as the communication module for sending and receiving requests for transfers from other players.

3. A control method for a touch-screen shooting game which first displays an effective shooting range which then detects whether an attack target is in range and commences the attack base on a command from the player.

4. A recording medium and server method for selecting game content to be used in an in-game battle -- the selected item being replaced by another option for a future turn.

5. A server and control method for selecting character cards from a selection and using them in battle against an enemy character -- the selected item being replaced by another option for a future turn. ---

Those are some REALLY broad patents. The fifth one describes pretty much all digital CCGs, more specifically Hearthstone (Blizzard) and Legends of Runeterra (Riot Games).