Here's a small tutorial how to play Painkiller MP without needing a key.

1. Download and Intall the Painkiller Multiplayer Demo

2. Install the PK Patches 1.61, 1.62 and 1.64

3. Install PK++ 1.2.1.64 Mod and update with the Updater

4. Have Fun playing Painkiller Multiplayer

If the Game doesn't start install the NoCD Patch, put it to C:\\Program Files\\DreamCatcher\\PainkillerMultiplayerDemo\\bin\\… then delete Painkiller.exe and painkillerdemo.exe. Do the same thing for the shortcut "PainkillerMPDemo" into C:\\Program Files\\DreamCatcher\\PainkillerMultiplayerDemo\\…

Some maps are bugged unfortanutely:

- DM_Illuminati, DM_Psycho, DM_Mine don't have textures/lightmaps and are hardly playable
- DM_Fragenstein, DM_Unseen/DMPCF_Warehouse, DMPCF_Tower are not playable

There is now a fix for the bugged maps, which can be downloaded here