Clover. Though the title was chock-full of charm, its dialogue was gruesome enough to sear the eyes right out of your head.
Fortunately, Tweed has learned its lesson, and plans on adding a touch of polish to the dialogue in the game's upcoming PC iteration, Clover: A Curious Tale. Not only will the script be fully voice acted, and the dialogue paired with animated character portraits, but the font used in the game has been significantly gussied up. According to the developer's blog, it's no longer "a hideous affront to humans with eyes." We're guessing that means your cats will still find it fairly repugnant.