Complex sentence: Characters in the game exist in either of the two worlds of Big Bang Comics (the Silver Age Earth-A or Golden Age Earth-B): players may create new heroes or take the part of existing heroes from Big Bang Comics.
Split into simpler sentences: Characters in the game exist in either of the two worlds of Big Bang Comics (the Silver Age Earth-A or Golden Age Earth-B). Players may create new heroes or take the part of existing heroes from Big Bang Comics.