CS 1.6 system requirements.

Check your Windows PC, free storage and graphics driver before downloading the portable client.

Requirement	This release
Platform	A Windows PC capable of running 32-bit desktop applications. This is not an Android, macOS, Linux or browser release.
Storage	Allow at least 2 GB of free space for the ZIP, extracted files and initial settings. Additional server content and logs can need more.
Graphics	A working OpenGL graphics driver. Update drivers through your hardware vendor or Windows Update if rendering fails.
Input	Keyboard and mouse.
Network	Internet access for the download, server list and online play.
Windows security	Windows Firewall and application isolation must remain enabled. Normal portable startup does not need administrator approval.

Steam, servers and licensing

The launcher can start without Steam. Servers that require Steam authentication may require Valve's official client and a valid game license. The official commercial version is available through Steam.

Need help?

Start with the extraction and installation guide. If it does not launch or connect, use the troubleshooting guide before changing system settings.