I found the labyrinth / maze part on Stage 9 – Jerico’s Heart quite frustrating. You need to have finished the Heliport part to go there, and you will need the Night Googles and the “Map” that maintenance Mike gives you. But the map is actually a message and the maze has some rules, not only go left or right.
 
 
I didn’t understand said rules, or maybe the PT-BR text was bugged. Either away, I managed to finish the level creating my own map. And since others may find this part to frustrating, here it is. Enjoy!
 
 
NOTE: Maybe there’s more on the area I didn’t explore. If so, please leave me a message. Thanks.
 
 

MAP

 
 

 
 
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