I recently wrote my first video game script and a week or so ago, the game came out. At first, the reviews were really positive and flattering, people claimed that they found the storyline intriguing, the character lovable, then a few days later, after people beat the game and saw the endings, the new reviews that came in are rather mixed, here's the problem. One of the character in the story, which have been established as stoic and tactical, had a major blowup in the end of the story and a segment of the players thought it was 'out of character'. I, as the writer, have no problem believing that someone can snap and just do a 180 after enough stress, but I think the lesson here is that it needs to be set-up. Considering that video game is mostly done with very little narrative or inner monologue, most things are conveyed with action or dialogues, and I didn't put enough hint for his turn, but here's my question: Do you think it's doable to make a sudden twist without any hint of it coming? Or should every big twist have a foreboding first?