Master Chief and the Spartans of Halo have to pee sometime: The question is how? But also when? And where? Halo developer 343 Industries gives us the official, technical, in-depth answer.
Master Chief, Character Profile Wikia
Xbox Creator Demands Action As Sexist Xbox Live Recording Goes Viral
Halo Anatomy: Master Chief's Unique Body, Explained
How does Master chief pee? Polygon got an article for you(link in comments) : r/halo
5 Superpowers Master Chief Keeps Hidden In Halo (& 5 Weaknesses)
Rocket
How does Master chief pee? Polygon got an article for you(link in comments) : r/halo
Halo Anatomy: Master Chief's Unique Body, Explained
Halo: Things Only Super Fans Know About Master Chief's Body
Rocket
5 Superpowers Master Chief Keeps Hidden In Halo (& 5 Weaknesses)