OnePlus Games
com.oneplus.gamespace
Occasionally runs in the background as part of the system.
Allows you to launch your game library, check game stats(such as playtime), activate game overlay features, change performance settings to tweak game/battery performance during gaming.
This is the only way to access the recording buffer functionality (records the last X seconds into RAM and saves them when you tap save), so keep enabled if you need that or any of the other features.