Cheating in DDNet generally refers to using third-party clients, scripts, or "bots" that automate gameplay or provide unfair visual advantages. Because DDNet is open-source, it is relatively easy for developers to create custom clients that inject these features. Commonly reported "cheats" include:

DDNet employs a multi-layered approach to prevent cheating, including:

The motivations for using these cheats are complex. Unlike games where cheating is purely malicious—used to dominate other players—DDNet is primarily a cooperative game. Many players turn to cheat clients not to ruin the experience for others, but to alleviate frustration. DDNet maps can be incredibly difficult, requiring hours of repetition to master a single jump. For a casual player, this "grind" can become tedious. A cheat client transforms an impossible obstacle into a triviality, allowing the player to see the rest of the map or play with friends who are at a higher skill level. In this sense, the cheat is used as a "sandbox mode," allowing players to experience content they would otherwise be locked out of due to the skill ceiling.