First off im a HUGE megaman fan, since i was a little kid. me and megaman were born in the same year ('87) and it was the first game i played on the NES.
This is a complete list of all megaman games relased in US, Japan, and China, for capcom-unity.com. im pretty sure this is every megaman game ever released
excluding goofy cell phone games that i saw on wikipedia, but if you want em, ill edit them into the bottom of the post.
Format:
—SERIES—
Name (Japanese Name) *System [Year]
—OG MEGAMAN/ROCKMAN—
Mega Man (Rockman) *NES [1987]
Mega Man 2 (Rockman 2) *NES [1988]
Mega Man 3 (Rockman 3) *NES [1990]
Mega Man 4 (Rockman 4) *NES [1991]
Mega Man 5 (Rockman 5) *NES [1992]
Mega Man 6 (Rockman 6) *NES [1993]
(Rockman Rock Board) *NES [1993]
Mega Man 7 (Rockman 7) *SNES [1995]
Mega Man 8 (Rockman 8) *PSX/SAT [1997]
Mega Man I (Rockman World) *GB [1991]
Mega Man II (Rockman World 2) *GB [1992]
Mega Man III (Rockman World 3) *GB [1992]
Mega Man IV (Rockman World 4) *GB [1993]
Mega Man V (Rockman World 5) *GB [1994]
Mega Man & Bass (Rockman & Forte) *SNES/GBA [1998]
Mega Mans Soccer (Rockmans Soccer) *SNES [1994]
Mega Man Battle & Chase (Rockman Battle & Chase) *PSX [1997]
Mega Man: The Wily Wars (Rockman MegaWorld) *sEGA GEN [1993]
Mega Man Anniversary Collection *PS2/GC/XBOX [2004]
Mega Man: Powered Up (Rockman Rockman) *PSP [2006]
Mega Man *PC [1990]
Mega Man 3 *PC [1992]
Mega Man: The Power Battle (Rockman: The Power Battle) *Arcade [1995]
Mega Man 2: The Power Fighters (Rockman 2: The Power Fighters) *Arcade [1996]
Mega Man *Sega GG [1994]
(Rockman Strategy) *PC [2001] <–China release only
(Rockman Power Battle Fighters) *PS2 [2004]
(Super Adventure Rockman) *PSX/SAT [1998]
(Rockman Complete Works 1-6) *PSX [1999]
(Rockman Battle & Chase) *PSX [?]
—MEGAMANX—
Mega Man X (Rockman X) *SNES/PC [1993]
Mega Man X2 (Rockman X2) *SNES [1995]
Mega Man X3 (Rockman X3) *SNES/PSX/SAT/PC [1996]
Mega Man X4 (Rockman X4) *PSX/SAT/PC [1998]
Mega Man X5 (Rockman X5) *PSX/PC [2000]
Mega Man X6 (Rockman X6) *PSX/PC [2001]
Mega Man X7 (Rockman X7) *PS2/PC [2003]
Mega Man X8 (Rockman X8) *PS2/PC [2004]
Mega Man Xtreme (Rockman X Cyber Mission) *GBC [2000]
Mega Man Xtreme 2 (Rockman X2 Soul Eraser) *GBC [2001]
Mega Man X Command Mission (Rockman X Command Mission) *PS2/GC [2004]
Mega Man X Collection ( ) *PS2/GC [2006]
Mega Man Maverick Hunter X (Irregular Hunter X) *PSP [2006]
—MEGAMAN ZERO—
Mega Man Zero (Rockman Zero) *GBA [2002]
Mega Man Zero 2 (Rockman Zero 2) *GBA [2003]
Mega Man Zero 3 (Rockman Zero 3) *GBA [2004]
Mega Man Zero 4 (Rockman Zero 4) *GBA [2005]
—MEGAMAN ZX—
Mega Man ZX (Rockman ZX) *DS [2006]
Mega Man ZX Advent (Rockman ZX Advent) *DS [2007]
—MEGAMAN LEGENDS—
Mega Man Legends (Rockman DASH) *PSX/PC/PSP [1998]
Mega Man 64 (Rockman DASH) *N64 [1998]
Mega Man Legends 2 (Rockman DASH 2) *PSX/PC/PSP [2000]
Misadventures of Tron Bonne Tron Ni Kobun PSX 1999
—MEGAMAN BATTLE NETWORK—
Mega Man Battle Network (Battle Network Rockman EXE) *GBA [2001]
Mega Man Battle Network 2 (Battle Network Rockman EXE 2) *GBA [2002]
Mega Man Battle Network 3 (Battle Network Rockman EXE 3) *GBA [2003]
Mega Man Battle Network 4 (Rockman EXE 4) *GBA [2003]
Mega Man Battle Network 5 (Rockman EXE 5) *GBA/DS [2005]
Mega Man Battle Network 6 (Rockman EXE 6) *GBA [2006]
Mega Man Network Transmission (Rockman.EXE Transmission) *GC [2003]
Mega Man Battle Chip Challenge (Rockman EXE Battle Chip GP) *GBA [2004]
—MEGAMAN STAR FORCE—
Mega Man Star Force (Ryusei no Rockman) *DS [2007]
Mega Man Star Force 2 (Ryusei no Rockman 2) *DS [2008]
NOTES - games that only appear in ( ) were japan releases only, games without ( ) next to them didnt have a japan release
NOTES - There is some kind of new Rockman stand up arcade in Japan(?) related to the Battle Network series, doesnt seem to be alot of info on it.
FROM WIKIPEDIA
Mobile phone games
Capcom of Japan releases several Rockman games for mobile phones in Japan. Only the first Rockman and Rockman Space Rescue Christmas were ported for US/UK cell phones.