Metal Gear Rising: Revengeance - Rules of Nature / Locked and Loaded Dual Mix Extended 

Each loop around switches the vocals between Rules of Nature and Locked and Loaded.
Lyrics
The time has come to an end
Yeah - this is what nature planned
Being tracked by a starving beast
Looking for its daily feast
A predator on the verge of death
Close to its last breath
Getting close to its last breath
RULES OF NATURE
And they run when the sun comes up
With their lives on the line
(Alive)
For a while
(No choice)
Gotta follow the laws of the wild
(Alive)
With their lives on the line
(No choice)
Out here only the strong survive
What’s done is done
Survived to see another day
The game of life
The hunter and the agile prey
No guarantee
Which of them will succeed
Strong or weak
LOCKED AND LOADED
Let the mercury rise on up
And it boils in my blood
(Alive)
I swear I'll
Tear at the seams till you come undone
Let the mercury rise on up
And it boils in my blood
(Alive)
I swear I'll
Tear at the seams till you come undone
I take it all - I take it all in and I
I save it up - I save it up for the fight
I feel the heat
The temperature rising
I'll make you bleed
(yell)
Locked and loaded
Rules of nature