In some game descriptions the tick (') is erroneously prepended by backslash, e.g.
https://www.adventuregamestudio.co.uk/site/games/game/2371/
https://www.adventuregamestudio.co.uk/site/games/game/2363/
https://www.adventuregamestudio.co.uk/site/games/game/2362/
https://www.adventuregamestudio.co.uk/site/games/game/2359/
Fixed!