Rockman4就最喜歡這兩首曲子, 要找到純音樂還真不容易...
Mega Man 4 OST, T20: Dr. Cossack Stage 2 (Cossack's Fortress)
Mega Man 4 OST, T23: Dr. Wily Stage 2 (Wily's Citadel)
這兩首曲子已經刻印在腦海深處, 永遠都忘不了了

上面兩首曲子還有混音版
Rockman 4 Complete Works OST, T20: Dr. Cossack Stage 2 (Cossack's Fortress)
Rockman 4 Complete Works OST, T23: Dr. Wily Stage 2 (Wily's Citadel)

還有Rockman3的title曲也很不錯聽, 個人推薦啦!!
Mega Man 3 OST, T02: Title

另外我個人喜歡的就是FF6跟復活邪神Romancing Saga一代的曲子了,

不過這兩款是SFC的遊戲, 就不在討論之列...

rockman4雜七雜八的一些攻略
http://www.youtube.com/watch?v=f91-yzJceuI
http://www.youtube.com/watch?v=mWbG...feature=related
http://www.youtube.com/watch?v=SFJwcRd8_Mg
http://www.youtube.com/watch?v=FUof...feature=related
http://www.youtube.com/watch?v=gVrc...feature=related
http://www.youtube.com/watch?v=l9WI...feature=related
http://www.youtube.com/watch?v=zcqf...feature=related