Complex sentence: After becoming reacquainted with Kazuya Mishima at the King of Iron Fist Tournament 5, Bruce Irvin decided to assist Kazuya with his scheme to take over G Corporation, and after they had succeeded Kazuya managed to control the corporation from behind closed doors.
Split into simpler sentences: After becoming reacquainted with Kazuya Mishima in Tournament 5, Bruce Irvin decided to assist Kazuya with his scheme to take over G Corporation. After they had succeeded, Kazuya managed to control the corporation from behind closed doors.