This is a completely free and open-source template for the UPBGE game engine, a community-driven revival of the old Blender game engine (BGE).
Simply load up the FPS_Template.blend file
it contains all the data to kickstart your first-person game. The
Player and Player Camera objects use the logic brick system,
you may want to check it out. Additionally, the Player object
uses the Player Movement component.
If you are new to the UPBGE game engine, check out the official UPBGE manual, and documentation.