20+ CSO2 Game Modes
Play CSO2 Deathmatch, Zombie, Big City, Stealth and many more exciting game modes.
Join Counter-Strike Online 2, operated by NexonTR. Download CSO2 for free and start playing now.
Features
Why CSO2?
CSO2 Weapons & Cosmetics
Create your own style in Counter-Strike Online 2 with hundreds of weapon skins and cosmetic items.
CSO2 Clan System
Create your clan in Counter-Strike Online 2, fight with friends and join tournaments.
CSO2 Competitive Ranked Matches
Prove your skills with CSO2 competitive matchmaking and ELO ranking system.
Download CSO2 Free
Counter-Strike Online 2 is completely free. Download CSO2 and start playing right away.
CSO2 Active Player Base
Meet thousands of active players in Counter-Strike Online 2, join events and tournaments.
About CSO2
Counter-Strike Online 2
What is Counter-Strike Online 2? CSO2 is a free-to-play first-person shooter (FPS) developed by Nexon on Valve's Source Engine. First released in South Korea in 2013, Counter-Strike Online 2 combines classic Counter-Strike mechanics with modern graphics and rich content, reaching millions of players worldwide. In 2026, CSO2 is still actively played.
How to play CSO2? Counter-Strike Online 2 offers over 20 unique game modes beyond classic 5v5 bomb/hostage scenarios, including Zombie, Hide & Seek, Big City, Gun Deathmatch, Endless Wave, and Stealth. The CSO2 competitive ranked matchmaking system allows players to prove their skills and climb the rankings.
How to download Counter-Strike Online 2? To download CSO2, visit csonline2.com, create a free account and download the CSOnline2 Launcher. Customize your playstyle with hundreds of weapons, characters, and cosmetic items. CSO2 is completely free to play — download and start playing now.
Game Modes
20+ Unique Modes
Original (5v5)
Classic bomb defusal and hostage rescue scenarios. Tactical team gameplay.
Zombie Mode
Humans vs zombies survival. Stay alive without getting infected.
Competitive Ranked
ELO-based matchmaking system. Earn ranks and climb the leaderboards.
Big City
Open world PvP and PvE mode. Explore the city, complete missions.
Hide & Seek
Prop hunt style mode. Disguise as objects and survive without being found.
Team Deathmatch
Fast-paced team deathmatch. Get the most kills to win.
Latest
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Support
FAQ
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Download CSO2 and Play Now
Download Counter-Strike Online 2 for free, play now. Thousands of players are waiting for you.