This is a process viewer, but its DLL injection capabilities are top-tier and rarely flagged as a cheat.

Modern CS 1.6 leagues and popular community servers use custom, kernel-level, or server-side anti-cheat plugins (such as ReHLDS guards, Metamod protections, or GameGuard). These systems will instantly detect public injectors and permanently ban your IP or hardware ID (HWID). Always test modifications strictly in offline LAN mode with bots. Step-by-Step: How to Safely Inject a DLL into CS 1.6

This is the biggest danger. Most "free top injectors" on YouTube or file-sharing sites contain malicious code. Undetected DLL injectors can:

Cheat Engine is an open-source memory scanner and debugger. While primarily used for modifying values (like ammo or health in offline modes), it features a highly reliable native injector.