The Freezer Card Key opens the deep freezer in the Island Base, later rewritten into the Waste Disposal Card Key. It is found by Leon held by a dead person. Immediately after, the room nearby that was blocked is busted open by a Regenerador.
The Card key can be found inside the Operating room, being hold by a dead corpse.
- Koichi Hamamura, ed (2006) (in Japanese). biohazard4 kaitaishinsho revised edition. Famitsu. ISBN 4-7577-2638-4.