- From the last extra, keep going forward towards the clean part of the river. Near the bank is a small hole in the middle of the forest. Inside it is the secret.
- From the last secret, jump into the river and move to the other side. There'll be a hole to your right. Inside the hole is the secret.
- Near where you obtain the Yellow key is one of the Yellow key doors. Next to it is a computer desk and a small window. Break the glass and enter this hidden part of the warehouse. Here you'll see the Level Infinity logo and a broken pile of boxes. Enter this pile to be credited the secret.
- Level alternate name is Toxic Waste Facility.
Level 7: Toxic Waste\Gallery
|Twin Dragon Levels|
|Level 1: Wang's Home • Level 2: City of Despair • Level 3: Emergency Room • Level 4: Hide and Seek • Level 5: Warehouse • Level 6: Military Research Base • Level 7: Toxic Waste • Level 8: Crazy Train • Level 9: Fishing Village • Level 10: The Garden • Level 11: The Fortress • (Secret Level) Prison Camp • Level 12: The Palace|