Complex sentence: In the first release of the game the main characters were the same as in "Pac-Man", although legal requirements meant that in subsequent versions it was changed to a round yellow face with very short legs wearing a green cowboy hat.
Split into simpler sentences: In the first release of the game the characters were the same as in "Pac-Man", although legal requirements meant that in subsequent versions they were changed. The player's character became a round yellow face with very short legs wearing a green cowboy hat.