Portal 2 has received a fan-made campaign expansion that adds eight levels – a couple of hour’s play time – to the beloved puzzler.

Created by Patrick Murphy, Designed for Danger follows Chell during an early part of Portal 2, before “the actions of a rogue force will set you on a new path through Aperture Laboratories”.

Campaign expansions are nothing new to Murphy, who has previously worked as lead developer on Half-Life 2: Episode 2 mods Precursor and The Door.

Designed for Danger is free to download, PC-only.