XCOM: Enemy Unknown is a turn based strategy game developed by Firaxis for PC, XBOX 360, Playstation 3, OS X, and iOS.

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What does the full research tree look like?

I find myself constantly wishing I had some idea what the research tree looked like. For example, if I want to unlock plasma weapons, do I have to go down the laser weapon path first to unlock it, or ...
49
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2answers
45k views

What alien bits should I sell?

I've got a considerable amount of alien detritus lying around my base: Some items, like the damaged UFO flight computer, are marked as useless and intended for sale without consequence. However, ...
44
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2answers
148k views

What is the perfect base layout?

Carefully planning your base's layout will lead to significant savings and bonuses. What goal should I have in mind when expanding my base? A perfect layout would be the one that wastes as little as ...
40
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3answers
85k views

How can I reduce panic in a country?

I had to ignore a call for help from India because the one from Germany had a better reward. Now India is at 4 out of 5 panic bar thingies, and I don't know what I can do to get that back down. They ...
34
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1answer
29k views

Where's this “Unit Analysis View”?

When I finish an autopsy, the research report ends with We may be able to gain further insight into this creature's unique abilities in combat if another specimen is targeted in the field in the ...
33
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3answers
16k views

Can I skip cutscenes in XCOM: Enemy Unknown?

Starting with the intro movie, XCOM features its fair share of cutscenes that I'm just not all that interested in. I know Firaxis made the game, I don't need to see their logo for a full minute every ...
32
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8answers
22k views

Is there any way to guide what class a rookie will become?

As far as I can tell, the game decides what class my guys will be promoted to upon receiving their first promotion. Are there any ways to influence this decision? Right now I'm stuck with more ...
32
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2answers
2k views

Is there a way to remove all items from squad members, or exchange items between squad members?

Is there a way to remove all items from squad members, or easily exchange items between squad members? It can be obnoxious to try and remember which items you've placed on which squad member, ...
29
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2answers
27k views

Can I get a country back into XCOM program?

I am playing XCOM - Enemy Unknown on Classic difficulty. In the first month, Australia quit the XCOM program. Due to the lack of money and fitting missions, I could not do too much to decrease the ...
26
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5answers
41k views

What determines if a soldier is gifted with psionic powers?

The game mentions a soldier's will influencing whether they have a gift or not. Since you can only test a soldier once, does that mean promoting a soldier a couple of times before testing might ...
26
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4answers
15k views

What actions gain experience for units?

I'd like to try to spread the XP around my group, so that I'm frequently ranking up both my experienced soldiers and my new recruits. I'm pretty sure that I get XP for killing an alien, but are there ...
25
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5answers
5k views

How often should my troops use Overwatch?

When my troops are deployed on a mission, how often per turn should I use the Overwatch command? Are there particular classes that are better at this, or is each class equally useful in this regard? ...
25
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1answer
18k views

Rules for succesfully capturing various aliens in XCOM

I've advanced somewhat into the game (I think I'm past the first half, have done the Alien Base and 7-8 missions after it), and I'm still puzzeled about which aliens I can capture and under what ...
25
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1answer
895 views

Do tasered aliens wake up?

In the original X-Com your little foreign buddy could wake up and run off during the mission. Does this happen in the new one, or are they out cold for the rest of the mission regardless of duration?
24
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2answers
3k views

When is Rapid Fire better than regular fire?

Assault soldiers can pick a perk that lets them fire their weapon twice at a -15 penalty to aim. When is it better to use this ability and when to use regular fire instead?
24
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2answers
5k views

What does it mean when the Alien Icon has a yellow reticle on top of it?

At the bottom right of the screen, there is a red or yellow alien icon for each alien that the currently selected soldier can see. Occasionally, when a sniper is selected, some of these icons have a ...
23
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3answers
14k views

How do you get “Ain't No Cavalry Comin” achievement?

The steam description for Ain't No Cavalry Comin' says "Have a soldier survive every mission in a full game". Two questions regarding this: In the first mission with the tutorial on, only one guy ...
23
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4answers
3k views

What is an “X-Ray”?

The soldiers are always going on about x-rays, but I have no idea what they're talking about. What is an x-ray? A lot of times, they'll mention x-rays when I kill an alien, but I think I've heard ...
22
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2answers
5k views

Is it beneficial to Hunker Down when I'm at full cover already?

Usually when I hunker down behind a bit of half-cover, the cover indicator goes 100% solid, as if I'd been behind a better bit of cover. It also gets a little outline and an "up" arrow above it. ...
22
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2answers
19k views

Capturing multiple of the same alien

Is there any benefit to capturing multiples of the same species? For example, say I've captured a Sectoid and researched the related interrogation, and now I've captured another - does anything ...
22
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1answer
918 views

Can you prevent a human victim from becoming a zombie after he/she is attacked by a Chryssalid?

Can you prevent a human victim from becoming a zombie after he/she is attacked by a Chryssalid? I was wondering if I should grenade my dead soldier after he was taken down by a Chryssalid.
21
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2answers
6k views

How long do crashed UFO's last?

I shot down a UFO, but a few of my "must have" soldiers are recovering from wounds. I would like to send them in 4 days, or 2 if I had to. Will the crash site disappear or otherwise go bad if I wait ...
21
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1answer
4k views

Is Iron Will applied retroactively?

Iron Will is a perk purchased from the Officer Training skill, which does the following: Soldiers received a larger Will bonus each time they are promoted. This is very useful, but most of my ...
20
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1answer
32k views

What does each Country Bonus mean?

If you launch a satellite for every country in an area you get a "Bonus" ... I can't find it in the XCOM Database. Mousing over doesn't show it. Is it listed somewhere? North America: Air & ...
19
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3answers
8k views

How does cover work?

From what I can tell, your units either have no cover, partial cover, or full cover relative to an enemy unit. However, even "full cover" doesn't mean "can't be shot", as I've definitely lost soldiers ...
19
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3answers
5k views

How does enemy progression work?

As I play the game, I notice that eventually tougher enemies show up. From what I've read, it sounds like this is based on elapsed time rather than "research checkpoints", but I haven't seen any ...
18
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4answers
8k views

What is the benefit of launching a satellite “a few days before the monthly report”

I've seen this hint in the game as well as on this site and I've been wondering if there is any specific advantage to launching satellites closer to the monthly report rather than any time during that ...
18
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2answers
2k views

How does “hearing” work?

Sometimes when I'm approaching an alien-infested area but haven't made contact yet, I'll get a notification from one of my soldiers that they can hear something. This is accompanied by a visual ...
18
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2answers
871 views

How should I choose my missions?

I do understand that I need to Go for missions with the higher current panic level. Go for the rewards that I'm missing (like engineers or scientists) In the early part of the game (first few ...
18
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2answers
7k views

How much willpower do gravely wounded soliders lose?

How much willpower do gravely wounded soldiers lose? The text says they suffer a permanent reduction?
18
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2answers
1k views

Do medikits repair armor?

If your soldier takes more damage than he has bonus health from armor, his health will start depleting, resulting in him spending days in the infirmary. Does healing a soldier restore his armor's ...
17
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2answers
20k views

What happens after I use the Gollop Chamber?

Once I have a soldier capable of using it (max level Psi power + Psi armor), clicking on the Gollop Chamber icon shows me a big fat warning: What happens from this point on? Is there anything I ...
17
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2answers
14k views

What (or who) are XCOM Hero units?

I've been hearing some chatter about secret "Hero Units" in XCOM - soldiers with pre-defined names, attributes, and abilities. The mighty psychic Sid Meier, of course, has previously appeared in a ...
17
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3answers
25k views

What are the differences between normal and classic difficulties?

I can't seem to find a good list of info of all the changes that classic mode offers over normal other than that 'its much harder'. Does any of the enemy AI improve in classic mode? Do enemies have ...
16
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4answers
7k views

Are the hit percentages predetermined?

I was playing a Terror mission last night where after my unit would enter an area, a Cyber Disc and two Drones would come around the corner of a building. All four of my other units were in a position ...
16
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3answers
58k views

Where are the savegames located in x-com enemy unknown?

I have a lot of savegames and I'd like to clean them up. Ingame you can only delete them one by one. There is a folder "Saves" in the steamapps folder (I have the steam game) but there are no files in ...
16
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3answers
3k views

What do distance units mean?

In XCOM configuration files, distances are expressed in some obscure units, that do not translate to grid cells easily. Example values: unit vision radius: 27 most weapons range: 27 sniper rifle ...
16
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1answer
2k views

Once poisoned does it matter if I stay in poison clouds?

Whenever a thin man gobs phlegm all over one of my guys I always move him away next turn. But I've been wondering about whether I need to: after all he's already poisoned. Do poison effects stack? ...
15
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1answer
4k views

What does it mean when the alien logo turns yellow?

At the bottom right of the screen, you will see alien logos for each alien that the current unit can actively fire on. Most of the time, these are red, but occasionally they will turn yellow. What ...
15
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2answers
3k views

How can I kill an enemy under mind control?

I was in a mission and had only one soldier with moves left and a berserker. Since I couldn't kill it with just one shot I mind controlled it. Then on the next 4 turns I got stuck with it, waiting for ...
15
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1answer
4k views

How does Line Of Sight work?

I'm a little confused by how the LOS system works. On a few occasions I've had my units be attacked when I thought they should be hidden from the enemy. I do not mean just in Full Cover since I ...
14
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5answers
27k views

How can I remove mind control from my soldier?

My one soldier who carries an arc caster just got mind controlled by the enemy. I would really like to capture this enemy rather than kill it, as I suspect I could learn a lot from it. How can I make ...
14
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2answers
21k views

What should I focus on to make money in Classic mode?

So, I've been having a great deal of trouble going from normal mode to Classic mode. My main problem is that I have countries jumping ship too much and I can't get the money and the facilities built ...
14
votes
2answers
18k views

What are all of the priority missions needed to complete the game?

I just finished assaulting the alien base. I feel like I'm getting close to the end of the game, though, and I don't like it when the ending comes up abruptly with no warning. How many priority ...
14
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1answer
2k views

Can I farm XP/resources on a VIP extraction mission?

I've just been tasked to recover a VIP from a hostile area by the council. After the VIP has been found, I have to get her to the extraction zone. During this time, aliens spawn randomly on the map. ...
14
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1answer
4k views

If i change projects, can I pick up where I left off?

I'm about halfway through a long research project, and still have 5 days left before it's finished. A new project just came up that only takes two days and is a priority project. If I switch to this ...
14
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1answer
1k views

Will a sniper with squad sight on overwatch fire at targets allies can see?

If I have a sniper on overwatch, and that sniper has the Squad Sight skill, will the sniper take reaction shots at enemies seen by fellow soldiers?
14
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2answers
12k views

What are the hidden achievements in XCOM: Enemy Unknown?

Steam lists the game as having 60 achievements, but only ~38 actually show up in the achievement list to start with. What "secret" achievements are there, and what are the requirements to unlock ...
14
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1answer
4k views

How does the Ethereal's damage reflection work?

The Ethereal alien species has a rather annoying habit of blocking and reflecting shots fired by my soldiers. I expected to gleam some insight as to how this ability works after performing an autopsy ...
14
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1answer
320 views

Is there any way to tell what continents I've already finished the game from?

Title pretty much says it all - for the "A Continental Fellow" achievement, you need to finish the game from each of the starting locations, but I don't recall which ones I've missed!