An analgesic or painkiller is any member of the group of drugs used to achieve analgesia, relief from pain.

Painkiller is a first-person shooter video game released on April 12, 2004. It was developed by Polish game studio People Can Fly and published by DreamCatcher Interactive. It is notable for using the Havok 2.0 physics engine extensively. The single player campaign gameplay involves killing large numbers of monsters. The game was particularly well received for its multiplayer experience. Painkiller was featured for two seasons on the Cyberathlete Professional League's World Tour.