Hello. After a recent playthrough of the game I compiled a long list of all the errors I could find with video proof.
If you wish to see a text list of the glitches discussed, here is a google docs
https://docs.google.com/document/d/1rJT-9HFovCayjBKg660d5EzdZYFsNuJ9TGUpUxE4KmQ/edit?usp=sharing...
I saw Trailer 3 of Man of Steel a long time ago, and I always thought that the song they used would fit perfectly for a game like Half Life 2, so I made my own trailer using the song.