If it claims “free verified key” for Starsector , it’s not legitimate. The only safe and legal way to get the full game is to purchase it from the developer.
There is a famous "free" key that is widely recognized by the developers and the community. In 2019, YouTuber SsethTzeentach starsector key free verified
A user on a popular gaming subreddit once posted that he found a "working key" on a sketchy forum. The key worked for two hours, then his computer started sending spam emails from his own account. The cost of cleaning his PC and resetting 40 passwords? Ten times the price of the game. If it claims “free verified key” for Starsector