Hoplite is a turn-based roguelike strategy game focusing on tactical movement around small maps. It is free to play and has a single in app purchase of $2.06 to unlock the full content.
Pro Optional continued gameplay
Starting on level 16, the altars get replaced by a portal. The player has the choice to "win" the game by exiting through the portal; or to ignore the portal on that level and venture deeper, aiming for higher scores on progressively more difficult floors.