Alien Hunters adds a new mission to game, three powerful enemies that will show up during the middle of random missions to fight you, and new equipment. The new enemies are a stronger version of the Viper, Berserker, and Archon, when they show up they will move after every single one of your soldiers and will leave the battlefield if they are not killed quickly. Killing them allows you to craft unique armor with new abilities and the passive benefit of scaring the normal versions of the enemies that it was crafted from. New weapons include a pistol that will conceal you after kills, an axe that can be thrown at enemies, a high damage gun that must be reloaded after each shot, and ice grenades that will freeze targets.The new weapons are all good but you will only get one of each and if you lose the character holding them and don't bring the body back you will not get another one. A new room has also been added to your ship where trophies of your kills are displayed on the walls. Price is a little high for what you get but the content is good.