XCOM 2 Collection

XCOM 2 is hard in a completely different way from most of the games on this list. It’s not about reaction speed or constantly dodging and shooting. Instead, it’s about your own strategy and judgment. 

This is a tactical strategy game where one bad decision can ruin your whole day; one bad step and your mission can fail, in turn affecting the larger campaign in ways you won’t feel until much later. Things like positioning, timing, and risk management matter a lot — and overconfidence gets punished constantly.

That is what makes XCOM so brutal, yet so satisfying. Missing a high-percentage shot at the wrong time can wreck your plans. Pushing your squad too aggressively can snowball into a disaster. Even when the game is not technically unfair, it is very good at making you feel the weight of every mistake. 

So if your idea of a hard iPhone game is something that forces you to think instead of react, XCOM 2 Collection is one of the best premium strategy experiences on the platform.

However, be warned that this game isn’t just demanding for you — it’s also hard on your iPhone and even your wallet (at least compared to other mobile games). Before dropping $15 on this tactical powerhouse, ensure your hardware is up to the task; XCOM 2 is a notorious battery-drainer that demands modern silicon to shine.