| Feature | CS 1.6 | CS2 | | :--- | :--- | :--- | | File Size | ~500 MB | 85 GB | | Can it run on a school PC? | Yes | No (requires dedicated GPU) | | Is it blocked by firewalls? | Yes, but easy to bypass | Yes, and impossible to bypass (Steam required) | | Learning curve | Weeks to master | Months to master | | Mods | Thousands (zombies, surf, jailbreak) | Very limited |

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Once you’re in, you need good servers. These are known for low ping, active admins, and no weird mods: