SCRABBLE is the original word tile board game that is free to play but includes in app purchases that range from $0.99 - $49.99 per item.
Worms is a turn based artillery game that costs $4.99 and also includes in app purchases.
Carcassonne is an online and local tile based multiplayer board game that costs $4.99 and includes in app purchases that range from $1.49 - $5.99 per item.
M&M Clash of Heroes is a strategy puzzle RPG based on the Might and Magic series that costs $4.99 and has zero in app purchases.
Star Realms is a collectable card game that is free to play and features in app purchases that are $4.99 per item.