Finish the game with -1% Collection or less. Implies a deliberate skip / trick run where Mina avoids picking up items that count toward the Collection percentage. Likely chains with Off the Grid (never use the Underlab) for the ultimate minimalist playthrough.
FAQ
How do you achieve Below Zero?
Finish the game with -1% Collection or lower — implies a deliberate skip run where Mina avoids picking up items that count toward Collection, paired with Off the Grid (skipping the Underlab). Technique pending datamine (VGTimes).