Level 4: Research Facility

Nested hint: What are my mission objectives?
(sorry, cannot decode section)
Hint: How do I get into the base?

Hint: How do I open the door in the long hallway?

Hint: Where is the key code to open the large door?

Hint: What do I do in this big, circular stairway?

Nested hint: Where is the metal?
(sorry, cannot decode section)
Nested hint: How do I open the outer doors to exit the base?
(sorry, cannot decode section)
Hint: How do I get back to the landing area?

Hint: How do I get the extra life?