Chapter VI: The Last War | Walkthrough The Bureau Guide

In fact, this choice doesn't matter at all.

When the mission begins, there is a breakdown in the Bureau. After a while you get a message from doctor Weir, that its cause is an awakening of the alien from the big container of elerium. Go to the Laboratory and meet the immaterial alien. The cut scene launches in which you have to choose: save the humanity or sacrifice it for the bigger good. But as it will turn out, the choice you make here won't affect the future events.

Interrogation was going well just to the some moment.

When the sequence ends, you wake up in the Hospital. Open door to the room with an Infiltrator, doctor Weir and director Faulke. After a short cut scene you'll have to chase the alien. On your way there use a Resupply Station and choose whatever weapon suits you. During the chase don't waste your ammo: enemy is immortal. But read the note, which can be found at the entrance to the big room with imprisoned aliens.

Aliens using human weapons?

When you get to the room, you'll be attacked by a big group of Outsiders - but they are armed with human weapons instead of their owns (stealers!). They aren't a threat due to the weak damage and weak defence. It becomes a bit worse when two Elite Snipers and a Shield Commander join the battle. They should be your priority targets. When you clean the room, go on the other side and upstairs. You'll reach the next floor (you can collect ammo from the very bottom of the room).

Infiltrator appears when all of the other aliens are dead.

Run forward moving through next rooms. When you get close to the weird device at the bottom of stairs, look for a nearby note. A bit further, in the corner of the room before moving to the next part of the building, you find another letter. There, after a short walk, you get to the Resupply Station. Then, enter the room with two hiding Elite Outsiders and two weaker aliens. Kill them with Mind Control, Lift and other useful abilities and prepare for another fight. Another group consists of a Tech Commander, two Elite Outsiders and a Sectopod. Eliminate them in the order listed above. Try to safe Lift for later on, as it'd be useful during fighting the Infiltrator. When he shows up, use this ability and kill this enemy - it'll save you from the long and exhausting battle.

Your perspective changes rapidly.

Move through more rooms - in one of them you can watch at the photo - and then go to the next level. In a room behind a part with moonwalkers you find a document, about examination of infested ones. When you get to the next part of building, a cut scene appears, and you'll be playing as Ethereal. In this form approach and take over Carter.

This is a decisive moment for the storyline.

After the next animation, you have a choice: wait until the bomb explodes and die during an explosion (what ends the game) or leave the Carter's body and run away. In the second option, you have to choose your next character which you'll be playing: agent Weaver, director Faulke or doctor Weir.

Your choice does matter that up to the end of the game, you'll observe the game from the particular perspective. It changes the point of view from which you will watch at the events but doesn't affect the way it will go (the game always ends up in the same way.