THIS DEMO IS NOT A COMPLETE GAME. Graphics are basic placeholders, gameplay is simple. See below if you want to improve this, this game file is open-source.
A 3D "looking around" game, with no third-party addons used! Want to make this and get some tips on improving it? The tutorial is at https://www.construct.net/en/tutorials/2d-3d-both-3d-without-3rd-2579
Update: Due to the addition of the 3D Object plugin, you may wish to experiment with 3D Object's powerful 3D capabilities instead of this simple 2D-powered demo.