A 'selfie', in case you're unfamiliar with the term, is a picture you take of yourself. Favoured by attention-seeking individuals who always post them on Facebook with the caption 'Oh god, I look awful', hoping someone will say 'nah, you look hot!', selfies are at least easy to take when you're short on time.
But we want Dave to take a selfie with his mug next to that of a famous game developer. Who might it be? Cliffy B? Hideo Kojima? Satoru Iwata? Obviously it's unlikely to happen if said games industry luminaries aren't actually *at* Gamescom, but there's bound to be someone ready to pose for a quick pic. Who can Dave get?