"Blast your way through the front gate of a secret underground military installation. Battle it out with enemy guards as you descend deeper and deeper into the subterrainean complex, acquiring an impressive arsenal of weapons and equipment along the way. You must find a computer disk that contains vital information about the toxic chemicals that are being produced inside this facility. Through wave after wave of enemy reinforcements, you make your way back up to the surface and search for the rescue helicopter which is waiting to carry you, and the disk, to safety... before time runs out. The fate of the entire world is in your hands!"
Chemical Warfare is a game created by Drew Costigan using the 3D Game Creation System in 1998.
"Chemical Warfare 3-D harkens back to the day when Wolfenstein was still in its prime and Doom was still on the horizon. Games were rated on how much fun they provided to the user and not just on whether or not they were on the cutting edge technology wise. Chemical Warfare isn't cutting edge, the author of the game admits this, but it is really fun to play. Battle your way through 7 levels with 7 different weapons: the Karate kick, the Slime Gun, the Grenade toss, the Machine gun, the Gas Grenade toss, the Rocket Launcher, and the Shotgun. This game features a bunch of nice music, cool sounds, and some really nice graphics all created by one guy*. Mecca Rating: 7.6 out of 10"
Costigan added a footnote to this review noting that he did not make all the artwork, as most of it was Game Creation System stock art.