

- Shadow Warrior 2 (avalaible on GOG)
- Half-Life 2 has a mod for campaign coop (Synergy if I recall correctly)
- Lots of zombie games : Left4dead 2, Killing Floor 2, …
- Borderlands
First Person but not totally shooter :
- Dying Light / Dead Island
- Vermintide / Darktide
It does it for me too, and it’s quite frustrating
Voyager is the only app on my smartphone that does that
Edit: it only happens if you swipe starting from the border of the screen, which may explain why it happens for lefties