Mayhem is spreading. Major Mayhem, that is, for Adult Swim has just released a - ahem - major update to its Silver Award-winning iOS rail shooter.

In version 2.0 of Major Mayhem, there's a whole host of new features, including 100 achievements, support for the new iPad's Retina display, 150 new mini-mission objectives, and three new game modes (Timebomb, Arcade, and Survival).

Given that Major Mayhem is now available for free - having previously retailed for 69p / 99c on the App Store - there really is no excuse for downloading it right away.

There's more. If you're the proud owner of an Android handset, you too can join in on all this shooting fun, for Major Mayhem is now available on Google Play.

You can grab Major Mayhem for free from both the App Store [download] and the Google Play Store [download].