Trivia
The music heard during the level Leningrad is the national anthem of the USSR.
Contributed by
Steve . (132) on Aug 16, 2009.
The first level, The Orphanage, is a big shout out to other horror-related games.
- The 7th Guest and The 11th Hour: the first room has a layout just like Mr. Stauf's mansion. The stairwell is pretty much identical as well.
- Grim Fandango: at the top of the stairwell, you'll see a message "In case of Zombies, Call Grim Fandango".
- American McGee's Alice: the library with the massive bookshelves
Contributed by
Santa 
(847) on Jun 11, 2007.
On April 30, 2005, both US and European English versions of Painkiller: Battle Out of Hell were put on the infamous German index by the BPjM. For more information about what this means and to see a list of games sharing the same fate, take a look here: BPjS/BPjM indexed games.
Contributed by
Xoleras (66998) on Dec 11, 2005.
Painkiller's proprietary 3D engine is called PAIN. The base game uses version 1.0, the expansion has the improved 1.5 version. The physics are handled by the Havoc 2.0 engine, just like Half-Life 2
Contributed by
Sciere (120406) on Dec 15, 2004.
