L.O.S.T. is an intense cooperative survival action game where up to four players are trapped in a deadly location.Your only chance is to complete the mission, hold back enemy waves, and survive until evacuation arrives. Every session is unique: your teamwork and decisions will determine whether you make it out alive — or remain forever lost. Features 4-player online co-op — survive together with friends. Different escape scenarios — refuel a helicopter, repair a ship, or reach the bus in time. Fight enemy hordes — use weapons, abilities, and tactics to push back. Scavenge & cooperate — gather supplies, repair transport, and protect your team. Fast-paced sessions — time is limited, and every choice matters. Add L.O.S.T. to your wishlist and be among the first to experience the thrill of survival!

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.