Steam officially allows refunds for any game played for less than 2 hours within 14 days of purchase. Treat this as your demo.
Assuming you’ve used the Steam refund method or found a legitimate trial, here’s what the first hour of Arkham Origins offers that mirrors what a demo would have included: Batman Arkham Origins Demo Download Pc 13
If you have an Xbox Game Pass Ultimate subscription, Batman: Arkham Origins is often available via backward compatibility. Steam officially allows refunds for any game played