In the first major update to its Uncanny X-Men: Days of Future Past mobile game, Glitchsoft has added Storm and Polaris as playable characters.They can be unlocked with the completion of the third level.

What's more, the game is available for 99 cents from the App Store for the duration of Comic-Con International.

Based on the seminal Marvel comics storyline by Chris Claremont and John Byrne, the side-scrolling 2D game allows users to play as Wolverine, Kitty Pride, Cyclops, Colossus, Scarlet Witch and now Storm and Polaris as they try to rewrite history and stop a nightmarish future from coming about.

Watch the Storm and Polaris gameplay trailer below.