#11
If you stripped out the manual aiming requirement and asked what the most naturally handheld-friendly shooter on Steam is, Deep Rock Galactic: Survivor would have a strong claim. Runs are short, restarts are instant, the progression keeps you coming back, and it runs beautifully on Deck. It narrowly missed the main list because it is an auto-shooter, which puts it at the edge of what this page covers. But for players who want something they can play in fifteen-minute bursts without thinking too hard, it is one of the best options available.