An aimbot takes over the aiming: it moves the crosshair onto the target, usually the head, with a speed and precision no human hand produces. A triggerbot does not aim at all. It watches one question many times a second, is an enemy under the crosshair right now, and fires the instant the answer is yes. The difference decides the detection method. Aimbots are caught on movement: human aiming follows Fitts' Law, with deceleration as the cursor approaches the target, acceleration and deceleration curves, and measurement noise. Perfect linear interpolation to a target violates all three. Triggerbots are caught on timing: human reaction to a target crossing the crosshair has a physiological floor around 150 to 200 milliseconds with a characteristic spread, and reaction times below that floor with high consistency indicate automation.
Aim is the aimbot's tell
A replay is usually enough to spot an aimbot, and that is the point. The crosshair snaps to a head with no tracking, no adjustment, and no overshoot, often through smoke or from a position where the player had no visual read on the target. The snap is the signature: a human hand approaches a target with a curve, slows down, and corrects. An aimbot draws a line. Server-side statistical detection formalises this, feeding mouse position time series, velocity profiles, and view angle rates into models that look for the temporal correlations an aimbot introduces, smooth tracking and periodic corrections that human hands do not produce.
The counter-move from cheat makers is smoothing: add a curve to the snap, add noise, slow the approach to look human. It works until it does not, because the smoothing itself has to be tuned, and a tuned curve repeated thousands of times is its own pattern. The honest version of this arms race is that detection is statistical and probabilistic, and bans come from the accumulation of evidence across many matches, not from one suspicious flick.
Related reading on this site: Home and What Is Good Bot Traffic vs Bad Bot Traffic? cover the neighbouring problems in more depth.
Timing is the triggerbot's tell
A triggerbot is harder to see in a replay because the aiming looks human: the player aimed, after all. What gives it away is the shot itself. The weapon fires the instant the crosshair crosses the target, with zero visible delay, even in situations where the player was not visibly tracking or anticipating the angle. Many cheat menus add a delay before the click so the reaction looks human, but a delay only moves the shot later. It does not make the pattern of perfectly timed shots go away, and a distribution of reaction times clustered tighter than human physiology allows is detectable in match data alone.
There are two ways a triggerbot knows when to fire, and both leave a trail. Screen-reading triggerbots, also called pixelbots, watch a small patch of the screen around the crosshair for the color of an enemy outline and fire when it appears. Memory-reading triggerbots read the game's own data on what sits under the crosshair. Riot's Vanguard already rejects input from any device that is not the primary peripheral, so a screen-reading cheat needs a workaround to fire at all, and cheats that load a library into the game client are either prevented under Vanguard or caught quickly.
Kernel anti-cheat vs server-side statistics
The two detection layers do different jobs and neither replaces the other. Kernel-level anti-cheat, BattlEye, Easy Anti-Cheat, and Vanguard, watches the PC itself: loaded drivers, injected libraries, handles to the game process, and input events with microsecond timestamps. Vanguard's boot-start model lets it observe later driver loads earlier in the boot chain than runtime-loaded drivers can. Server-side detection watches the match data the server already keeps: mouse movement, click timing relative to target position, and velocity profiles.
The hardest cheats to catch are the ones that touch neither layer: a separate physical device reading memory through a hardware connection, or separate hardware watching the screen and feeding inputs back. There is no cheat software running in the game process to flag. That is why the strongest practical defence is layered: kernel checks on the client, statistical checks on the server, and player reports as a third signal, because each layer catches what the others cannot see.
Frequently asked questions
What is the difference between an aimbot and a triggerbot?
An aimbot moves your crosshair onto the target. A triggerbot leaves the aiming to you and only fires the weapon the instant your crosshair lands on an enemy. Aim is the aimbot's tell, timing is the triggerbot's.
How does anti-cheat detect a triggerbot?
Two ways: on the PC, kernel anti-cheat watches for injected libraries and non-primary input devices, and in match data, reaction time analysis flags shots that fire faster than the roughly 150 to 200 millisecond human floor with suspicious consistency.
Why do triggerbots add a delay before firing?
To mimic human reaction time. A configurable shot delay makes each individual shot look plausible, but the distribution of reaction times across many shots stays tighter than human physiology produces, which is what server-side detection reads.
Can a triggerbot work without any software on the game PC?
Some can, using separate hardware that watches the screen and feeds inputs back, or a device that reads memory through a hardware connection. These are significantly harder for conventional detection to catch, because no cheat code runs inside the game process.