The player travels over immense world of the Zone, its all locations joined into one global map. He can choose any route and will not be limited in his traversing the Zone. The player will be offered free exploration full of generated and scenario-imposed tasks, participation in the eerie events of a murky world.
The player will become a stalker, a guy who earns money from shoveling embers out of infernal oven of Chernobyl Zone. Returning from the radioactivity-blazing Zone, he will sell anomalous formations to underground dealers and scientists in research camps on the Zone border.
With the money procured, the player will purchase equipment, weapons and protective suits allowing him to reach previously inaccessible areas.
This is a role-playing game without growing experience of your character, without changing characteristics and levels. We want the player to develop his real mastery, moreover Stalker is an FPS/RPG game and much depends on his ability to fight. Changing characteristics, levels and player's experience, to our mind, would destroy the realism we try to create. As far as the rest is concerned, this is almost a normal RPG game where players travel the Zone, collect artifacts, weapons, reveal anomalous zones, communicate and trade with NPCs etc.