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Bardbarian is free on the App Store right now, and some famous faces appear to have been added to the Silver Award-winning tune-based tower defence mash up.

Three new characters have been added to the roster, including Octodad, the giant eponymous turtle from Shellrazer, and Meat Boy from Super Meat Boy.

Quite how they'll fit into the scheme of things remains unclear, but since the game doesn't cost anything at the moment, you can find out for yourself.

At review we described Bardbarian "an intriguing mix of genres that gel together brilliantly."

If that sounds like something you don't want to spend any money on, then head on over to the App Store right this second and get it grabbed.