The Second Alien War introduced aliens and new battlefields that took place underwater as well as on land. X-Com had been somewhat prepared for the war, as many alien technologies from the last war were useless underwater. X-Com was reduced to using compressed-air based weaponry, not very powerful but equally powerful on land and at sea. Later on, plutonium-powered Gauss Weapons based on the Elerium-powered Plasma Weapons quickly replaced the weak and clumsy dart guns and harpoon rifles. This is a list of all weapons and equipment used by X-Com during the Second War, including standard issue gear, homebrew technologies and Alien/X-Com hybrid technologies.