10 Mistakes The Developers Accidentally Left In Your Favourite Video Games

1. "Allan, Please Add Details" - Hitman: Blood Money

Sometimes a genuine mistake just gets out there, and as much as IO Interactive have crafted some phenomenal sandboxes of interworking AI scripts and dynamic set-pieces all rotating around your agency as a player, in Hitman: Blood Money's case, 'Allan' just never got round to finishing this part of the game.

The Allan in question is most likely Allan Hansen, 3D graphic designer and key member of the art department at the time. You've still got to hand it to the guy, as thanks to people like him, we were all so blown away by every other aspect of Blood Money to notice.

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Are there any other infamous guffaws in high-profile games you've noticed? Let us know your favourites in the comments below!