S.T.A.L.K.E.R.: Clear Sky marks the initial chronological installment in the acclaimed S.T.A.L.K.E.R. series. While its predecessor successfully captivated players with the immersive atmosphere of the Zone, Clear Sky built upon this foundation with significant enhancements. Among these improvements are advanced technical features and enhanced visual effects, particularly concerning dynamic elements like smoke and weather patterns.
The key to these advancements lies in the upgraded X-Ray game engine utilized in Clear Sky. This sequel also introduced a revolutionary Faction War system that alters gameplay by restricting alliances, limiting players’ ability to assist dominant factions if they align themselves with rival groups.
Exploring the Factions in S.T.A.L.K.E.R.: Clear Sky



Throughout the S.T.A.L.K.E.R. universe, players encounter numerous factions, not all of which are recruitable. Engaging with one faction often leads to becoming an adversary of another, thus players should be mindful of the implications that come with their alliances. Below is a detailed overview of the various factions present in Clear Sky:
Clear Sky
- Enemy Faction: Renegades
Clear Sky, a scientific organization, is committed to investigating and mastering the Zone and its abnormalities. Their philosophy suggests that the Zone is a human-created anomaly worthy of study rather than domination. Although this faction has a smaller membership, they compensate with superior organization and technical expertise.
The objective is understanding the Zone, not conquering it.
Freedom
- Enemy Faction: Duty
Envisioned as advocates for liberty, Freedom champions an anarchistic perspective on the Zone. They resist any militarized control and strive for free access and exploration. Players who align with Freedom can benefit from lighter equipment and a sniper-oriented gameplay style, making it suitable for those favoring stealth and precision.
Duty
- Enemy Faction: Freedom
Duty represents a militarized faction intent on neutralizing the threats posed by the Zone. They perceive the Zone as a peril to humanity and thus maintain a strict hierarchy, providing members with extensive combat training and advanced equipment. Aligning with Duty may lead to hostility with Freedom, but it also grants access to superior gear suited for players who prefer aggressive, armored combat.
Bandit
- Enemy Faction: The Loners
The Bandit faction comprises opportunists and thieves, focused on survival and profit, often at the expense of others. Though they may appear under-resourced, their strength lies in their numbers. Players siding with Bandits can enhance their SEVA suits, making this faction an advantageous option for Artifact hunters seeking unique upgrades.
Loner
- Enemy Faction: The Bandits
In contrast to the Bandits, the Loners embody a more neutral stance within the Zone. They are scavengers motivated by survival without the criminal undertones associated with Bandits. This faction is ideal for players wishing to minimize conflict, while still having access to a healthy merchant network.
In addition to these factions, players will also encounter non-recruitable groups such as the Military, Mercenaries, Renegades, and Ecologists. The Ecologists serve as scientists, while the others function as formidable adversaries. Notably, these factions are set to return in the upcoming S.T.A.L.K.E.R. 2.
Choosing Your Faction in S.T.A.L.K.E.R.: Clear Sky


Factions dynamically engage in territorial disputes, allowing players to influence which groups gain supremacy in the game. Selecting a faction not only grants unique advantages and missions but also results in firmly establishing enmities with opposing factions. Consequently, players cannot fully experience S.T.A.L.K.E.R.: Clear Sky in a single playthrough.
Fortunately, players can uncover every quest in just two playthroughs. Initially, players should choose between Freedom or Duty, as aligning with one makes the other a rival. Players can switch factions during the game and can later opt to join either the Loners or Bandits, creating new adversaries along the way. In the subsequent playthrough, selecting the opposite factions from the first run enhances the overall experience.