System Disk:
Find all five medals to start the jukebox in the bar on Floor 26. Find the hidden note on the picture by the door of the bar. Go to the jukebox, and select ERROR to get the System Disk.
Steel rope:
The steel rope needed to get to Floor 27 can be found on the floor in the plasma barrier room on Floor 26.
Alternate appearance and weapons:
Successfully complete and save the game. Load the saved game and select the character that completed the game. Press Select at the character screen and choose "ARMS" to access new costumes or weapons. This will also unlock the sound test option with sixteen songs. Successfully complete the game a second time to add another set of costumes and eight more songs. Successfully complete the game a third time for the final set of costumes and eight additional songs.
Power handle
The power handle needed to open the disposal chute in Rachel's room can be found in Store Room B on Floor 27.
Roulette ball
The roulette ball that is used on the roulette table can be found on Prof. Howard in Surgery on floor 25, after defeating the boss woman with the CLAW.
Metallic badge
This item shows the password needed to open the safe.
Glowing moss
This item is used to raise your character if he/she dies, and will also restore his/her HP to the maximum. It is found on Floor B6. Note: Use the save point in this area. This is the last one before you will have to defeat a series of Bosses to complete the game.