Speed hacking is a form of cheating in First-Person Shooter (FPS) games that causes players to move beyond normal limits, disrupting gameplay balance. This study analyzes simple anti-cheat techniques to detect and prevent speed hacking in Valorant and Counter-Strike 2. The methods used include literature review, conceptual observation, and rule-based simulations. This involves validating player speeds, limiting maximum speed values, and checking movement logic. Simulation results indicate that normal players have speeds of around 4.79 to 6.02 units/second, while players suspected of speed hacking reach speeds of 7.87 to 10.36 units/second. This difference suggests that speed thresholds can be an early indicator for detecting movement anomalies. Simple anti-cheat techniques do not replace complex commercial systems, but they can serve as a safe and easy-to-understand starting model for maintaining fair play in competitive FPS games. Keywords: anti-cheat, speed hack, FPS games, threshold, fair play
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