Patch uaktualniający Painkillera do wersji 1.64, należy instalować go jako nakładkę na wersję 1.62. Lista zmian:

MULTIPLAYER:

• FIX: Freezer bug
• FIX: Dead bodies bug
• FIX: Gold Armor bug

SINGLEPLAYER:

• FIX: If a certain path is taken you can't proceed (Docks) is fixed.

DEMO RECORDING:

• FIX: Items now disappear correctly.
• FIX: Demon morph mode is recorded in demos.
• FIX: Sometimes demos were playing with incorrect speed.

NOTE: Version 1.64 can be installed only on PK ver 1.62 or 1.63.