Complex sentence: Adrian Stephens was paid 400 pounds for writing Killer Gorilla, a game he wrote after buying a magazine that had screenshots of the four levels of Donkey Kong, and made him feel like doing something similar.
Split into simpler sentences: Adrian Stephens was paid 400 pounds for writing Killer Gorilla. He wrote it after buying a magazine that had screenshots of the four levels of Donkey Kong, and feeling like doing something similar.