What was clu?

Answer 1

He Is Sam Flynn's Father Before He Dissapeared Into A Cool Retro Type Arcade Game And Never Came Back.

Flynn Was On The Hunt For His Dad When Suddenly He Encountered A Strange Arcade Machine Like In The First Tron.

And When He Went Inside To Have A Look He Got Zapped And Teleported To A Strange Cyber World Filled With Computer's And Stuff.

And His Dad Was In The Game And Wanted Him To Complete The Games By Throwing Cyber Disks At People And Motorcycles At Them!