Are you still feeling bad about that whole Weighted Companion Cube incident? Still pining for it's friendly, rounded corners? A new mod promises to take you back in time to before the events of the original Portal, when your little inert buddy was still free to.. remain motionless.

And what a mod - Portal: Prelude is huge, actually bigger than the original game. It has 8 new chapters, 19 test chambers, a new plot and over 400 lines of dialogue (with English and French subtitles!).

You will need Steam, a copy of Portal and possibly some other bits and bobs like Counter Strike Source - the developers have, rather endearingly, forgotten.

This trailer should give a taster of what to expect when the game is released later this month...

Portal: Prelude[www.portalprelude.com thanks to Greg H for the tip]

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