Science and Industry
- A teamplay modification for Half-Life, in which players assume the role of Security Officer in one of two rival corporations striving for domination in the cutthroat world of chemical weapons research and development.
- http://si.planethalflife.gamespy.com//

International Online Soccer
- A mod in which players play soccer on opposite teams.
- http://ios.planethalflife.gamespy.com//

The Battle Grounds
- A modification for Half-Life based on the American Revolutionary War.
- http://www.bgmod.com/

Grand-Theft
- Team based half-life mod, which tries to get the flair of the crime scene.
- http://www.grand-theft.net/

Scientist Hunt
- Teams compete to kill the most scientists.
- http://www.telefragged.com/thefatal/scihunt.shtml

Firearms Half-Life
- News, forums, screenshots and beta download for a Half-Life modification with 27 new weapons.
- http://www.firearmsmod.com/