The developers of Prison Architect found themselves in a pinch of legal trouble recently when they were contacted by the British Red Cross over the game's use of a red cross on a white background to denote health. While that may seem harmless, turns out it's not allowed.
"If the red cross emblem or similar signs are used for other purposes, no matter how beneficial or inconsequential they may seem, the special significance of the emblem will be diminished," an email sent to the game's developers reads. "The red cross emblem or similar designs are not general signs of ambulances, health care, first aid, the nursing or medical profession, or similar matters. Moreover, they are not signs to be used for commercial purposes, such as for advertising campaigns or on products."
Which, fine, whatever. Introversion's Mark Morris and Chris Delay are understandably upset, though, that the ICRC's enforcement of this rule is so inconsistent; you can point to countless games, TV shows and movies that use the red cross symbol and get away with it, while their indie game hasn't just been targeted, but they have been told that their use of it technically constitutes a violation of the Geneva Conventions, and by extension British law as well.
L: older Halo games, R: newer Halo games
Introversion have since gone in and updated the game to remove their use of the symbol. Which happens a lot more often than you might realise; while many properties continue to use the red cross "illegally", others like Halo have quietly changed it over the years without anyone really noticing, changing things like the colour of the icon, or replacing the cross with a "H" or other logo.
Left 4 Dead's health pack