MARK BELONGS IN SILENT HILL. It had to happen eventually. He's the perfect subject.
The subject line was actually a reference to Upgrade Complete, rather than Portal, but Brooker in the world of Portal could be interesting, particularly as he has in fact played the game (he describes it as 'An astounding accomplishment; part abstract brainteaser, part sci-fi thriller, part black comedy. Imagine being stuck inside a 3D puzzle with a playfully cruel sense of humour. Something that simply couldn't be replicated in any other medium'). I'm not sure he'd have the agility required to cope with the test in real life.
no subject
The subject line was actually a reference to Upgrade Complete, rather than Portal, but Brooker in the world of Portal could be interesting, particularly as he has in fact played the game (he describes it as 'An astounding accomplishment; part abstract brainteaser, part sci-fi thriller, part black comedy. Imagine being stuck inside a 3D puzzle with a playfully cruel sense of humour. Something that simply couldn't be replicated in any other medium'). I'm not sure he'd have the agility required to cope with the test in real life.