Activision is looking to whet gamers' appetites for its forthcoming Prototype sequel with a free iOS puzzle spin off called Protoslice.
Available from today, it's a modified version of Twitchgames' Slice app which sees you carefully moving blades around the screen to give you access to a hidden panic button.
Check out the trailer below for a closer look.
The full Prototype 2 experience is still a way off, not due on shelves until April next year. Eurogamer's recent preview should give you a good idea of what to expect from Radical Entertainment's follow-up to its solid 2009 action title.