Other mistake: There is no way for Eddie to enter cheat codes, and no way for his real-life vehicle to teleport or to go faster than it already could.
Other mistake: When Matty and Sam are having a conversation about modern games vs older games, Matty is playing a game on a Playstation 4 but the controller isn't on.
Answer: The rules were violated when Eddie used cheat codes during the "Pac-Man" round in order to have an unfair advantage over the aliens; this is similar to how Xbox achievements and/or PS3/4 trophies are disabled when cheat codes are active.
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