S.T.A.L.K.E.R. - Clear Sky is an FPS video game developed by GSC Game World. It is the direct prequel to the S.T.A.L.K.E.R.: Shadow of Chernobyl and was first released in 2008 in Russia. In this game, the player takes the role of Scar. The game is set about a year before the events occurred in Shadow of Chernobyl. It depicts the story of Scar as he tries to discover the cause of the anomalous activities occurring in the Zone.
The game features RPG, FPS, and survival horror elements. It features a faction wars system, wherein several factions available in the game struggle to conquer, defend, or retake a territory. Scar is a Stalker mercenary. As such, he can do missions for any factions of his choice. The player may also join any faction except for the Military and Swamp-dwelling Renegade factions. In some cases, the player may also choose a neutral side. Scar’s ultimate goal is defeating Strelok.
The game has both single player and multiplayer modes. The single player mode contains RPG and FPS elements wherein the player completes objectives in order to complete the final mission. The game’s multiplayer mode can be played via LAN or the Internet. There are 10 available maps for the multiplayer mode. Players can also choose between three game types – Deathmatch, Team Deathmatch, and Artifact Hunt.