Mega Man Network Transmission, known in Japan as Rockman EXE Transmission, is a video game developed by Arika and published by Capcom and ShoPro Entertainment for the Nintendo GameCube console. The game was first released in Japan on 6 March 2003, North America the following June, and PAL regions the following July. Network Transmission is part of the Mega Man Battle Network series, which originated on the Game Boy Advance handheld.

Megaman Network Transmission incorporates aspects of action and platforming games similar to other Mega Man series, while retaining the strategy and role-playing elements of the Battle Network series. The player takes control of the protagonist Lan within the game's real world and his NetNavi MegaMan.EXE within its internet. Unlike previous games in this series, Lan is restricted from moving location to location. Instead, the player uses a map screen with points of interest to travel to different levels. Levels are opened up as the player progresses through the game, with a slight emphasis on linear progression, although MegaMan can move off-path at times. Levels typically end in a boss battle with another NetNavi. Combat takes place in real-time, with MegaMan given the ability to jump, slide, fire his default arm cannon, and dodge enemy attacks on a two-dimensional plane.