Ghosting / Missed Inputs

When simultaneous key or button presses fail to register because the hardware or software cannot process overlapping inputs correctly.

In games, this means

On low-quality keyboards, pressing three simultaneous keys may only register two. For fast-paced games requiring complex simultaneous inputs, ghosting causes actions to silently fail, the most frustrating possible outcome because the player did everything right. Anti-ghosting keyboards and N-key rollover support prevent this.