We report an unusual case of retained metallic intraocular foreign body (IOFB) presenting with acute retinal necrosis (ARN). A healthy young man presented with signs of ARN including hypopyon, dense vitritis, and peripheral retinal necrosis following alleged history of trauma with a high-velocity projectile. After initial management of ARN with systemic antivirals, a retained metallic IOFB was identified and subsequently removed surgically. The patient was followed up for 12 months postoperatively and retained excellent vision without recurrence of the ARN. The diagnosis of an IOFB in a case with associated inflammation can be challenging. A strong clinical suspicion with proper investigations can achieve optimum results.