Lyric discussion by IZSBHR 

Cover art for Devil's Arcade lyrics by Bruce Springsteen

I am 100% sure it's about a soldier who's dying of combat wounds (narrated by his friend):

Remember the morning we dug up your gun The worms in the barrel, the hangin' sun

Somebody made a bet, somebody paid The cool desert morning, then nothin' to save Just metal and plastic where your body caved

In the ward with the blue walls, a sea with no name Where you lie adrift with the heroes Of the devil's arcade

Then, his lover visits him, promising him he'll recover:

A voice says "Don't worry, I'm here" Just whisper the word 'tomorrow' in my ear

His condition worsens as the song goes on:

Rising from a long night as dark as the grave On a thin chain of next moments And something like faith

At the end of the song, he dies:

A bed draped in sunshine, a body that waits For the touch of your fingers The end of a day

The beat of your heart, the beat of her heart The beat of her heart, the slow burning away Of the bitter fires of the devil's arcade

My Interpretation