The main task Stalker – Complete 2009 (2012) to give the original action realism and comfort. The control system and the storyline have not undergone global changes. True, certain elements have been added, the graphic characteristics have been improved. At the beginning of the game, the user can make a choice. Here it is possible to start a single passage, or immediately go on a free hike. In any case, such a factor as weather conditions is improved here. Cyclicity has been added. It can suddenly rain, or fog can descend. In any case, it is necessary to keep weapons and cartridges dry. After all, they can fail. The lighting of the area has been radically redesigned. It is now affected by the position of the sun or moon in the sky. Sometimes in the evening you can see a shooting star or comet in the sky.

In STALKER – Complete 2009, scientific suits were modernized. They can now react to the health of the owner. If necessary, medicines are introduced into the body automatically. In addition, changes affected artificial intelligence. For example, opponents quickly react to changes in the situation, make decisions. The developers eliminated minor flaws and errors. A separate block is the soundtrack. The sounds of the surrounding nature were added. New compositions and melodies were brought to the soundtrack. They can be appreciated at Sidorovich, Barman, in other abode.