Upon clearing the Red and Yellow levels of the Vegan's game, the reader and their friends, Katy and Jordan, are transported back into the game room and warned that "The Arcturians are the most intelligent race in the galaxy. No one has ever outwitted them." before being transported to the Blue level. Upon arriving, the three aliens challenges the reader with three most difficult puzzles that they designed. In order, the puzzles are a Goosebumps trivia question (explained as one of the books being recovered in a time capsule), a magic square math equation, and a space themed word search and whether a even or odd amount of words can be found.
Upon failing any of these puzzles, the reader and their friends can be sentenced to slave away in the spice mines, become brainwashed into obedient servants of the Arcturian's, or disgusting the aliens with your pleading to be sent home, only for them to do so but as a floating head due to lack of spacecrafts. However, if you succeed in all three puzzles, the Arcturians all explode out of anger, consequently winning the game and liberating the Vegan race.
Arcturians are described as big bald heads that bare resemblance to a human's, but have the stark contrast of having pale blue skin. They're kept inside three small, round glass cases and explain their peculiar state to the unnerved reader by saying Arcturians had outgrown the use of bodies as more of their time was spent thinking.
- Interestingly enough, the Goosebumps trivia question asks about the scavenger hunt list in the Give Yourself Goosebumps book Trapped in Bat Wing Hall instead of it being based on the original series.
- Arcturus actually happens to exist, being the brightest star in the constellation of Boötes, the fourth-brightest in the night sky, and the brightest in the northern celestial hemisphere.