Mercy

The meaning is fairly straightforward if you analyze it in the context of the other songs in the Drones album.

In Psycho and Dead Inside, the protagonist succumbs to the disillusionment that every human being goes through, becoming every bit as jaded and psychopathic as the modern world encourages him to be. In Dead Inside, the protagonist embraces his loss of innocence -- "Now I'm dead inside" and "You've taught me to [...] kill with no remorse" -- hardening himself and becoming a callous, unemphatic human being in order to survive. He was hurt in the past; now he'll hurt others. But he doesn't see it as hurting others -- he thinks he's doing other people a favour, by ridding them of their naivete the same way he lost his.

In these earlier songs, the message is that the rational thing to do while living in a psychopathic society is to become psychopaths ourselves -- it's how we adapt and survive, after all.

Mercy, however, offers us a moment of rebellious self-awareness -- the protagonist realizes that his strategy for survival is hurting him. "Help me, I've fallen on the inside" -- the person that he used to be, noble and hopeful and full of life and humanity, has been replaced by one who's disconnected and incapable of true human connection.

"I tried to infiltrate, but now I'm losing" -- He tried to be like the people who hurt him, but it isn't working because they'll always be better at it than him. They'll always be more jaded, more coldly rational, more psychopathic. Another line that alludes to this is "Men in cloaks always seem to run the show".

Moreover, I think there's a dual meaning to the hook. "Show me mercy" can be interpreted as the protagonist asking to be saved by someone who hasn't succumbed to the psychopathic system -- anyone who's still innocent, still noble, still untarnished. It's a common theme that jaded people are attracted to the innocent, precisely because they want to be saved from the callous way of life that they've created.

The dual meaning, however, is that he could also be asking for mercy in a spiritual sense. There's a few religious allusions in the song ("soul" and "absent gods"), and I think the protagonist is aware of the unfeeling things that he's done, aware of the part he's played in propagating the system -- and he's asking for forgiveness from a (possibly religious) authority figure for his sins.