Metal Gear Delta Boss (1) Guide.
Believe it or not, you fight this boss twice. First as it in it's "Imposter General" form, and second is the true battle against it. You fight the first battle in a nuclear launch zone, and he is trying to launch it. However, you bust in, and seeing how you could be a threat, he calls over the general's soldiers, and gets them to help fight you. So...yeah. basically, you fight it and infinitely spawning army minions in a small empty room with cover and the launch controls. This is actually the big gimmick of this fight. Basically, every once in a while, he will stop fighting you and try to use the controls. If he is at the controls for longer than minute: Instant game over. And it can be a bit of a pain since their is a ton of enemies. Tough level enemies. Luckily, just one shot to the boss stops him, and you have plenty of time. As for it's attacks, he has a few. First of all, he can shoot you with his assault rifle. It doesn't do a whole lot since by this point you probably got the bullet proof vest, but if you don't, just hide behind cover, and you will be fine. He can also throw one of two grenades: Flash Bangs, and Regular Grenades. The first one is really just a distraction, while the other is just a way to keep you off the move. His last attack is just a combat knife that he will use if he gets real close. He also has pretty low HP. Honestly, the big threat is the always spawning mooks (Although there can only be 2 at a time, 4 when the boss gets to half health), and the already mentioned launch controls.