Not too impressive.

This tries so hard to be epic. So very hard. I appreciate that you used all the correct HL2 SFX (Despite the fact it seems you used a pistol sound for shotgun), but it just reeks of trying too hard.

Nice one

One thing though,
Don't let your friends see this.

Average

AGH THAT STOOPID WHO WANTS TO BE A MILLIONARE MUSIC

Why can't Tutorials have QUIET music??

Anyways, that tutorial is good, if a bit short. It's good that you gave examples though.

Lovely

Theres just something about this game i really love.