Favorite video game trailer or commercial?

Hey everybody. This is my first thread on Giantbomb so be nice. I was wondering if we could all share some of our favorite game trailers or commercials. Here are some of mine. 
  

Recently: 
 
  

Bungie and Epic do really good trailers/tv spots for Halo and Gears of War respectively.  Though, I don't know if they actually produce them.  
 
Examples: 
 
Halo: Reach "Deliver Hope"
  

Resident Evil 2 commercial. Mostly because its Romero.

In terms of successfully selling me a game, nothing - and I mean nothing - has done a better job than Modern Warfare 2's launch trailer. Seriously, all I could think was DUDE LOCK N LOAD I NEED TO SHOOT PEOPLE IN THE FACE RIGHT EFFING NOW YEEAHHH after watching this.  
 
  

Ratchet and Clank-- Hilarious, fun, and get at the themes of the game. 

Gears of War, all of them.

The Mass Effect 2 Launch trailer was superb. 
 
  

anything with the CEO guy from sony. those are pretty good ones.

Definitely always chuckled when I saw this Socom 2 Commericial.
 
  

Only two commercials inspires goosebumps every time I see them, and they're both for Halo games: 
  
    

" anything with the CEO guy from sony. those are pretty good ones. "

" @Kierkegaard: YES! I loved those from the PS2. 
  

"

" The Mass Effect 2 Launch trailer was superb. 
 
  

   Best trailer I have ever seen. "

  I don't have a favorite. But here's a few I like.

This 
 

These are the one's that have stuck with me over the years, pretty creative and funny.   

  The Ratchet and Clank commercials are awesome. I remember seeing this one as a kid and like, instantly wanting the game more than anything in the world. Still a pretty funny commercial.

mass effect 2 launch trailer is the best imo

Damn I am loving some of these commercial.