Arkham Origins Incident
Penguin's Henchmen positioned well sighted henchmen that were armed with Sniper Rifles to guard the outer perimeter of the Final Offer, as well as a squad of regular gunmen. Deadshot used his unconventional, but powerful sniper rifle and his sniping skills in an attempt to assassinate Batman, but instead hit a GCPD SWAT helicopter in the Bowery. Deadshot also used it in the trailer for Arkham Origins, and wielded it in order to stop Deathstroke from lethally attacking Batman (so that he could kill the Dark Knight himself) and shot his Sword right down to its hilt and destroyed a hung chain that carried a large crate in order for Batman to escape. There were also snipers on the rooftops around the Diamond District GCR Tower.
Arkham Asylum Incident
The Sniper Rifle made a few outdoor appearances starting from the middle of the game. It shared the same model as the Assault Rifle, but was much more powerful and had a distinctive laser sight that emitted from it. Crossing the laser beam would have the sniper alerted to your position, no matter how far away you were. At close range, that weapon's accurate shots and slow rate-of-fire made it easy to evade.
Arkham City Incident
The Sniper Rifle returned with its own model, but retained the same stats. It had more appearances throughout the story than it did in Arkham Asylum, and it sometimes supplemented other firearms in stealth situations. It was still a venerable weapon in close-quarters. Deadshot also used his Sniper Rifle to kill his targets. In some situations, henchmen would use those for recon purposes, to guard items, or locations of high importance.
Arkham Knight Incident
Jason Todd modified his dual handguns that could merge into a Sniper Rifle.
- As aforementioned, the sniper in Batman: Arkham Asylum had the exact same model as the Assault Rifle, but it shot more powerful rounds and had a thin red laser that emitted from the barrel. In Arkham City, Arkham Origins, and Arkham Knight, it had its own model.