Slayer is a simple strategy game for iOS written in Swift with Apple’s SpriteKit framework. The game is as of yet unfinished but functions well enough to be played on my ancient iPhone 4.

Rules:

You must conquer all the other players. There are four tiers of units with each one stronger than the last. These are the pawn, bishop, knight and king. The player may fortify with towers for 15 gold each. These towers defend all the adjacent tiles from any unit weaker than a knight. Each unit type costs three times as much maintenance as the last. Upgrading a unit costs 10 gold. If you run out of gold all your current units die. Occasionally trees may appear. They should be chopped down (preferably with a pawn) as soon as possible because each tree decrease the tile’s income from 1 to 0.