Doors Are Important!

[Aerowind]

I deal with boarders just fine with level 2 doors. The trick is to start venting most of your ship the second you see they have a teleporter. When they finally teleport over, lock them into whatever room they arrived in (hopefully a systemless room, but it's usually alright unless it's the door or O2 room. As soon as everything in their path is vented, shut all of the doors and turn off the O2 so they don't refill. Most of the time they'll opt to try and find a room with oxygen instead of blowing up your systems, and if you've vented enough of your ship, they'll be dead long before they reach your crew.

[TheKillerNacho]

I always, ALWAYS get Doors to Level 2 early in Sector 1. Its a cheap useful upgrade at only 20 scrap.

Doors Level 3 is something I almost always have by the third sector, depending on how much scrap I'm able to find and what else I need to spend scrap on.

Both door upgrades are extremely useful and cheap. Why wouldn't you upgrade them?

[boa13]

Doors Level 3 is something I almost always have by the third sector, depending on how much scrap I'm able to find and what else I need to spend scrap on.

Is this playing in normal or easy mode?

[Local_Ork]

I try to pick doors pretty fast, but without hurry. They are useful, but not as useful as better shields or energy bars

If I play on Easy, I do upgrade them early to level 3 since this mean I can just win most boardings with few smart clicks on doors.

On Normal I go to lvl 2 first sector and don't bother (unless I have scrap later in game) due to harder fights, both on board and outside. Doors don't do that much difference vs. 2-4 mantis, at least as big as medbay

Doors are good, if for sole purpose of managing fires.

[TheKillerNacho]

Doors Level 3 is something I almost always have by the third sector, depending on how much scrap I'm able to find and what else I need to spend scrap on.

Is this playing in normal or easy mode?

Usually easy mode, yes.

When playing on normal, I still get the 3rd door upgrade before Sector 6, though.

[Neoviper]

I've found doors two to be a useful upgrade against boarders, less for dealing with them without any crew involvement, but for allowing you to fight them and retreat for healing without them being able to run about completely uncontrolled. Probably wouldn't be necessary if I knew the boarding AI better as the other guy mentioned., but for now It helps out.

[actionhero112]

The only downside to getting blast doors is that it becomes harder to control air flow. When an enemy boarding party busts down a door to a deoxygenated room, it stays open. This means whatever room you were trying to keep ventilated immediately starts losing oxygen. This can be somewhat hazardous when you're deventing the entire ship, (except for the medbay) and you want to force your opponent to the medbay by doing so, and then they force open the doors and drains the entire room of oxygen sometimes killing one of your crew because they are weak Zoltans. This will not happen on level 1 doors.

Also a lot of people say 20 scrap isn't a lot, but there has been many a time in one of my playthroughs that I am 20 scrap from being able to afford an upgrade, a weapon, an augment or what have you. Every little bit counts.

[OmegaJasam]

As an added bonus, upgrading any system to level two means the system can soack more damage before hitting the hull or going down entirely.

Before hitting the hull is only true for boarders destroying a system. A laser shot that hits a subsystem will still also do hull damage, unless you have the Rock Plating augment.

I did mean an either or. I think it gives you more time against fires too if I recall right.

I've never had a problem with the airflow due to blast doors. If it gets to the point they're breaking into a room I wan oxyginated, it's probably the medbay, and unlike them, your dudeds can run away to other rooms if needbe.

20 scrap vs firespread control, easyer crew control, prevention of door control loss (Losing door control when o2 is down and you have a breach/open outside door can get nasty quick.) and the ability to do some apshrx damage... It usually pays for itself. Especially if you hit a lot of mantis border early on and don't have a strong crew yourself.

[kikito]

I see boarding invaders basically as free combat xp for my crew. Killing them with asphyxiation feels like a waste.