I watched this movie 5-6 years back, I remember the story but not the title. This movie starts in a train with an AI heavyweight cyborg and a girl, both return after completing a mission. This is an animated movie, and the animation looks like the one you find in games.
The cyborg clears out all non-essential tasks from his system as it runs out of battery. And all of a sudden, a few other cyborgs intercept their train which leads to a fight. Finally they return something to a gangster who is also a cyborg, who even has horns. He insists this duo to do another job, which can earn their freedom.
In the middle of the movie, they help two more people who are on another mission: an enhanced soldier and an Asian girl. In return, the soldier finds a malfunctioned disc in the robot, which eats up all his battery.
The girl is the key in the movie. Only she can activate a giant spider-like machine which can kill anyone in its way.