Head into the newly-opened subway tunnel, and once inside follow the track. Pickup the 2 EMERGENCY SPRAYS, 3 SWITCH BOMBS and 2 ENERGY PACKS on your way around the bend. Now would be a good time to save your progress as the next section can be tricky. After saving, head straight on as the tunnel opens up.
Cut scene
Following the cut scene, you regain control of Acarno on the train and will notice a 60 second timer in the top-right corner of the screen – when the countdown is complete you will have arrived at your destination.
While it’s possible to simply let the timer run out, there are 9 items you can collect on the train during this time. Getting all of them is quite tricky, so if you are aiming for all 9 items and do not have the GRAVTY CONTROLLER turned on before the timer starts, you may as well load up that save file because it’s impossible – every second counts. If you’re aiming for the best possible CP score (i.e. fewest number of deaths), you may need to load up your save file a few times instead of wasting multiple retries.
It’s important to note there are several overhead pipes that will kill you instantly if not avoided. The lower pipes must be jumped over, while the higher pipes can simply be avoided by running underneath.
Start off by picking up the two separate EXTINGUISHING SPRAYS and the EMERGENCY SPRAY on the train floor in front of you. Jump onto the roof of the front of the train.