This is a commercial ad of Titanfall 2. This commercial was released in October 2016 in United States. Under the title of “Titanfall 2: Become one”.

Pilot and Titan must Become One in the sequel to Respawn’s genre redefining Titanfall. The incredible speed of a Pilot with the devastating size of a Titan, when two combine, none remain.

It was done by Argonaut, San Francisco advertising agency. And the commercial by Production Company is Blur Studio and is directed by Dave Wilson.

From one fight on to the next. 
Two outlaws ride, their weapons flexed. 
One is quick, the other’s tall. 
Together they’ll kill them all.

Bang bang, they shot them down. 
Bang bang, they hit the ground. 
Bang bang, they torched the rest. 
Bang bang, with lasers from their chest.

Bang bang, their kill counts rise. 
Bang bang, their enemies die. 
Bang bang, better hit the ground. 
Bang bang, here’s the rocket sound. 
Ooo ooo oooo ooooo

Bang bang, two legends one legacy. 
Bang bang, surrounded by enemies. 
Bang bang, go ahead and cry. 
Bang bang, you’re all about to die’. 
Ooo ooo oooo ooooo

The commercial song is “Bang Bang (My Titan Shot Him Down)” by Grace. However, this song “Bang Bang (My Titan Shot Him Down)” has not yet been released. We will let you know as soon as it gets released. 
And, the original of this song is “Bang Bang (My Baby Shot Me Down)” by Cher. Here, you can preview songs and check them on Amazon or iTunes.

Titanfall 2: Become one 
Client: Electronic Arts 
Geo: United States 
Released: October 2016 
Advertising Agency: Argonaut, San Francisco 
Producer: Matt Green 
Production / VFX Company: Blur Studio 
Director: Dave Wilson 
Executive Producers: Al Shier, Greg Talmage 
Director of Photography: Ken Seng 
Supervisor: Dan Akers 
Producers: Tiffany Webber, Brian Keeney 
Audio: Rohan Young, Susie Boyajan / Lime Studios 
Composer / Arrangement: Rob Cairns 
Music: Bang Bang (My Titan Shot Him Down) by Grace