And you should know there are multiple vents in the level, and each one of them will take you to something good. But you have to beware of getting too close to him. If you do this enough times, you can eventually take him out. That means you can go in one entrance to a vent and then come out another exit and then sneak up on him. But once you stumble upon them, you’ll find that Marchenko can’t follow you into them, and he can’t see where you are going. This is hard to do on your first playthrough, as you won’t now where they are. If you run out of energy to stay invisible, then you have to hide behind objects.īut there’s one particular solution that makes the battle much easier. And if you use stealth, or using the augmentation that makes you disappear for a few seconds, you can shake off his pursuit. If you can keep moving, you can escape his cannon and his drones. The key to fighting with Marchenko is mobility and hiding. Those upper levels are roped off by laser-triggered mines, so you have to be careful moving around. The battleground is a huge open area of a skyscraper, with a couple of upper levels on either end. I fought with Marchenko during two complete playthroughs of the game.