My Body May Be Present But My Soul Is On The Beach. I'm Already Dead.

Answer and Explanation:

This phrase is associated with the game "Death Stranding" which is a game that takes place in the post-apocalyptic world where the few surviving living beings transit between the world of the living and the dead while looking for what Death Stranding is.

This phrase refers to the mechanics of characters' dead that the game presents. This is because when a character dies the game is not finished, as the character is transported to the world of the dead, where he must fight to return to the world of the living.