Murakumo

Free mission mode:
Successfully complete the game in scenario mode.
kimiko.

Expert mission mode:
Successfully complete the game in scenario mode with an "A" rank or higher in each mission.
kimiko.

LX-30R:
Successfully complete the game in scenario mode to unlock the LX-30R in free mission and expert mission modes.
kimiko.

Special Arts option:
Successfully complete the game in expert mission mode.
kimiko.

Bonus FMV sequence and music test:
Successfully complete the game in expert mission mode with an "SS" rank in each mission to unlock an FMV sequence from the 2001 Tokyo Game Show under the "Special Movie" option and the "Music Mode" option.
kimiko.

Hint: Defeating upgrader Geo-Sweeper:
On the mission where you are fighting the first upgraded Geo-Sweeper, choose Cloud-Breaker 05. Follow it until you get to the highway, then use timed A attacks to knock it out of the sky.
Guamislander4.