Steam Droid (Steam Droid)
This droid that falls under your control is very unusual, but at the same time eternal, as it works on steam power, just think. Nevertheless, he is much more and stronger than his other cohabitants. You can change regular bullets for ricochets, rockets or something more powerful, maybe they won't be useful to you at the beginning, but when it comes to the boss, you can't do without them.