You can now support Irongate with an optional, one-time developer tip from the main menu. Choose from three amounts, with prices shown in your local currency. Tips do not unlock items or affect gameplay.

A much deeper Armoury: every turret and the walls now have 15 ranks, each with its own look, and new abilities at ranks 5, 10 and 15. The towers you buy now stand on top of your castle in Survival. Stars come faster once you pass wave 20. The lobby board also shows versus and co-op results, and quick match never keeps you waiting long.

Survival has a leaderboard: see everyone's best wave on each map, right in the lobby. You start with a random name. Tap it to type your own, and your leaderboard rows follow.

Five new survival maps: Frostpine Pass, Mirewood Ford, Dune Caravan, Crystal Hollow and Ashen Caldera, with Evie's island to finish. Every map now comes with the app, so they are all there on first launch, even offline, and new maps still arrive automatically.

Explore the new help book for towers, enemies and battle rules. Upgrade towers with clearer, easier-to-tap controls. Enjoy a new Irongate launch screen, automatic landscape layout, sharper visuals and improved online map selection.

Improved the first-game tutorial, clearer tower and enemy information, and a compact main menu that stays correctly aligned when switching game modes.

• Explore refreshed maps with painted biomes, villages and themed scenery. • Face a smarter bot that defends its gate against early attacks. • Enjoy improved camera panning, a new app icon and confirmation before leaving a match.

• Team up in Co-op mode to defend a shared castle across three dedicated maps. • Switch between Versus and Co-op from the main menu. • Smoother battles with improved rendering performance and updated tower and enemy visuals.