Key Features: Three new missions are fighting against a mysterious island, treacherous canyons and ancient temples! Fight against the powerful Aludran Reptiloid for the first time in Serious Sam 3 and face an entirely new gigantic final boss! Any more laser guns? Do you have a sniper rifle? Is it a new battlefield? You understand! New challenging achievements. In order to activate the Jewel of the Nile DLC, you need to have the Steam Membership ready for the Serious Sam 3 game.