Combat Technician

MARINE
Squad Engineer	Difficulty: Medium Supervisors: Squad Leader Rank: Not defined Duties: Set up defenses, babysit sentry guns, open doors and spam barbed wire. Guides: Construction, Guide to Engineering Unlock Requirements: Not available. Detailed Description: |__________| Not defined |__________|

But the good news — we got four of these robot sentries with display and scanners intact. They really kick ass, I think they'll come in handy. ―Corporal Hicks, Aliens

As a Squad Engineer, you main goals will be fixing power, getting through doors, and setting up fortifications for a FOB (Forward Operating Base) that'll be used for defence and to secure a supply route. Without you, your platoon will have no power or a FOB which is critical for mission success.

You'll have two different playstyles you can experiment with. One, as a FOB building and Utility Engineer, who sets up defences and makes sure power is running. The second way to play Engineer is to be a Combat Engineer, breaching walls, hacking open doors, welding vents and repairing broken APC and lights as marines advance. Both are as good as the other, but too much of one is bad. Make sure there is an FOB that will be able to be defended, and if there is one, make sure marines will be able to effectively make it from building to building.

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Equipment and Gear

Metal and Sandbags

At round start, there are 30 plasteel sheets, 100 metal sheets and 100 empty sandbags in the prep room. Plasteel is in short supply due to its high cost at Requisitions, it is advised to split the stack with your fellow Squad Engineers. You can do so by having the stack in one hand then click it with the empty hand, moves one sheet per click. Don't hoard loads of building supplies otherwise you might find fellow Squad Engineers unable to perform their jobs.

Sentry and M56D

You'll have to make a choice on what defensive equipment to vend. Keep in mind you can only pick one so it’s worth discussing with your fellow engineer (if you have one) for the one that best suits your needs. Vend the coin then insert the coin to unlock the equipment.

Defensive Equipment:	Description:
UA 571-C Sentry	The Sentry Gun automatically tracks and fires upon any target that is wearing an ID not hooked up to the Almayer's systems. Via IFF, they are unable to hit friendly marines, allowing them to be safely placed behind marine lines as they lay down suppressing fire. Comes with various options, such as burst fire, single shot and the ability to take control of it. Has 500 bullets. The default powercell has only 1,000W which won't last long, get a High-Capacity Powercell (10,000W) from the engineer prep vendor to replace it. Ammunition: M30 Box Magazine (10x28mm Caseless) Contains 500 10x28 caseless rounds. Ammunition for the UA 571-C Sentry. Construction and Maintenance: How To Construct It: Construct Turret Frame with Plasteel, Wrench it, Apply Cable, Add Turret Piece, Apply Metal, Weld it, Add Turret Sensor, Click on the sentry with an empty hand to open the control interface and turn it on. Maintenance: Wrench for anchoring/unanchoring the sentry, making it moveable. Crowbar for taking out powercell (after turning off). Screwdriver for rotating the sentry (after turning off). Welder for repairing. If the sentry is knocked over click on it with an empty hand to right it. During its construction, you can examine the half-finished Sentry to see what part is missing. The default powercell doesn't last long, use a High-Capacity Powercell instead.
M56D Mounted Smartgun	The M56D HMG is an emplacement that a marine will have to man in order to fire it. It fires heavier smartgun bullets that have increased penetration, at the downside of being immobile and not having IFF, allowing it to friendly fire. With CTRL-Click, you'll be able to toggle on burst fire. Holds 700 rounds. Construction and Maintenance: How To Construct It: Click on the mount once it's in your hand, Wrench it, Mount the Gun, Screwdriver it, Apply Ammo Drum. Drag the gun on yourself to man it Maintenance: To toggle burst fire, Ctrl-click the M56D before manning it Screwdriver for disassembling. Wrench for rotating. Welder for repairing.

Your Gear

Get your gear from the Squad Engineer prep room. Most notable gear are:

• Welding Goggles are used to avoid eye damage when welding. Remember to flip them down before you start.
• Webbings can be found in your vendor to help carry additional items, apply the webbing to your jumpsuit. Holds 3 normal size items.
• The gloves in your locker are insulated gloves. If you lose them, get another pair from the vendor.
• For backpacks, you can choose from these two out of the vendor:
  • Welderpack that holds 5 normal size items with 260 welding fuel.
  • Engineering backpack that holds 7 normal size items.
• Toolbelt, see the table below for details:

Toolbelt tools

Item:	Function
Screwdriver	Used for securing and unsecuring sentries, also used to open maintenance panels for hacking.
Blowtorch	Used for cutting through walls and fixing sentries. Has 20 units of fuel inside. Refillable with fuel tank, welder pack or welding tank (turn off before refilling).
Crowbar	Used for Opening unpowered doors and displacing girders so you can move them.
Wrench	Used for securing most objects to the ground including girders,vendors, also has another use to rotate sentries. Easily the most used tool in your arsenal.
Cable coil	Used for fixing robotics and diverting power to other areas.
Multitool	Used to hack doors/ vendors along with disabling mines.
Wirecutter	Used for cutting cable coil and barbed wire, and mending it.

Vendor

Item	Function
M40 HIDP Incendiary Grenade (2x)	Used for setting an area ablaze as area denial.
C4 (4x)	Used for exploding through walls or through people. Mostly used to blow into the CIC to mutiny.
Minebox (1x)	Used for exploding aliens who run over it. Mostly used for killing survivors and exploding dead aliens. Contains 4 mines. Deployment and Deactivation: How To Deploy A Mine: Take a M20 mine out of the box with an empty hand, Stand on top of the tile you want to place the mine on, Face the tile you want the mine to detect enemies on, Click on the mine in your active hand. Keep in mind that any mob that enters the mine's tile, or the tile it's facing, living or dead, will cause the mine to detonate, unless they have an appropriate USCM/W-Y ID. How To Deactivate Mines: Use a multitool on the deployed mine. Tactics: Deploy the mines at where marines will likely be present/guarding (and within view range), thus more likely to result in a kill. The trigger area is two tiles, the mine's tile and the tile it's facing. Cover the whole two tiles corridor instead of leaving one tile open. Conceal the mines with (lit) flare, empty flare box, wood plank, unfolded roller bed, empty backpacks, etc. Deploy the mines facing north or west, because they can easily be concealed with a lit flare.
Circuit Boards (10x)	Used for fixing various things that need circuit boards, such as airlocks, APCs, and or air alarms.
File:Mesons.png Optical Mesons (2x)	Used for seeing the layout through walls.
Light Replacer (2x)	Used to replace lightubes and light bulbs quickly. 50 uses, feed with glass to refill.
Entrenching Tool (3x)	Used for digging and filling up sandbags, as well as deconstructing them. Can be folded to fit in a backpack.
High-Capacity Powercell (10x)	Used for powering various devices that require power. 10,000W.

In the field

Power and TComs

Upon the first deployment, you are likely to be tasked to either fixing the Power, fixing the Tcoms (APC) or FOB duty.

Overcoming obstacle

• Use crowbar to pry open powered down doors.
• Hack to power down/unbolt doors for crowbar to pry open.
• C4 down door/walls.

Lighting up the place

Fix the APC's and replace broken lights with the light replacer along the way as you advance.

Floodlight Repair

While you may have fixed the power for the colony, the xenomorphs will have most likely broken floodlights around the place which you'll need to fix. To fix a floodlight you'll want to use the following steps:

= -> -> -> ->

• Floodlight can be unwrenched and be moved around.

Wall and lights

File:Wall and light.PNG

You can construct a wall in the open and mount light fixtures on it, then use the light replacer to install the lightubes. By constructing these along

Securing flanks/supply route

It's crucial to secure the supply route from FOB to the front. Otherwise, reinforcements, Medics and wounded marines will be easy targets to be picked off and the front will risk being cut off and encircled. Since material supply is limited so you can't barricade all the way. Instead, you need to focus on the choke points like doorways, to secure as many sections you can with the little materials you have. You can save some materials by simply welding doors shut along the way. And once marines have learnt that Xenos use vents, you can weld the vents shut to deny their usage. You can also use vendors/cabinets as blockades to save more materials but they block bullets as well, resulting in a potential cover for aliens.

• Use blowtorch on the vents/doors. ( Flip down before you start.)
• Use wrench to move vendors/cabinets/hydro trays as blockades (hydro trays don't block Runner).

Frontline FOB

Without a frontline FOB, Medics and the wounded will be harassed constantly and supply melted. And in the event of counterattack, marines will likely to be routed without a place to fall back to. Frontline FOB doesn't need to be big, often parts of the FOB will be left unguarded and melted. A good frontline FOB would need enough killing zone between the cade line to the nearest corners/covers Xeno can hide. Otherwise, they will keep hitting the cades yet you can't kill them.

Barricade as marines push

Boiler gas and Crusher charge are deadly in choke points and corridors, putting barricades between them and marines helps. Sandbags are particularly well suited for this job, as they can be built by marines and the build time is short. Metal barricades (with barbed wire) work too, though instead of standing in the front and build there, it's much safer to build it just behind the front then use and to move them to the front (use and to secure them again). If you are out of Plasteel at this point, you can just build them in the middle of the corridor (e.g. middle 2 tiles out of 4 tiles), then the sides tiles in further one tile. This way, you can provide protection against gas and charge without hindering marines' push too much.

Robotic limbs repairing

Target the damaged limb and use:

• Blowtorch for brute damage.
• Cable coils for burn damage.

FOB Duty

As an Engineer on FOB duty, you'll be setting up the base that the marines will primarily use to organize, resupply, to retreat to, and to make a final last stand at. To make a good FOB, you'll want to make strategic use of your landmines, the smartgun HMG or the sentry gun, and various defensive emplacements. A good FOB is the difference between losing the round and holding off long enough to make a push back and finally win the round.

Principles

You don't need a mega FOB

LZ/FOB will only see poking most of the round until siege happens because FOB is a hard target. Thus, Hunters/Runners are likely to focus on marine's unsecured sections of the supply route. Focusing your effort solely on FOB means using a large amount of material to counter a token force while ignoring the threat targeting the more vulnerable areas. Instead, you need to secure flanks/supply route too.

It is the weakest point that matters

One breach is all it takes

It doesn't matter there are three layers of barricades in Nexus if the one layer metal barricades at LZ is breached, the wounded and the supply will be killed and melted. Even worse, Xeno can ignore Nexus entirely and focus on LZ then everything in Nexus will be wasted.

Use materials wisely

One is enough

A high traffic corridor? A plasteel barricade with barbed wire. No traffic but a high threat (e.g. Crusher charge/constant poking)? Sandbags barricades with barbed wire. No traffic and just want to keep Runners out? Metal barricades with barbed wire. And try to save materials by

• Use blowtorch on the vents/doors. ( Flip down before you start.)
• Use wrench to move vendors/cabinets/hydro trays as blockades (hydro trays don't block Runner).
• Then build barricades behind them if it's high treat and you can spare

Plasteel is expensive, 50 points for 30 plasteel (6 doors) vs 10 points for 50 metal (8 barricades with barbed wire). Yet plasteel is crucial to how many secure spaces you can create. If you are out of plasteel, you are force keep an opening in the cade line, thus compromising the effect of the barricade line.

Fortifications of the Trade

See Guide to construction for how to construct and deconstruct.

Image	Name	Material Needed	Function
	Wood Barricade	Wood	Used for a hasty defence against aliens. Mostly seen prespawned.
	Metal Barricade	Metal	Used for constructing auxiliary fortifications. Third most durable fortification. Can be repaired with a blowtorch if not overtly damaged.
	Sandbags	Sandbags	Used for making directional defences, multiple can be applied to a tile. Needs to be filled up with empty sandbags and an entrenching tool. 25 in a filled stack. Second most durable fortification. Can't be repaired. Can be dismantled with an entrenching tool.
	Plasteel Barricade	Plasteel	Used to allow passage by closing it, and providing heavy protection. Most durable fortification. Can be repaired with a blowtorch if not overtly damaged.
	Barbed Wire	Metal	Used to make barricades and sandbags stronger, and making it so they can't be ran or climbed over. Also damages anything that attacks it.
	Wall	Metal	Used to fully block off an area.

FOB Construction Quick Tips

Barricade Placement

Barricade Placement	Description
	This is an example of what not to do when constructing a defensive position. In the picture on the left you'll see that the xenomorphs are able to hit the barricade without being shot due to it's forward position and as such the xeno will be able to break through and kill that marine with ease.
	This is an example of what you should do when constructing a defensive position. To rectify the above barricade placement errors you'll want to move the barricades back one tile like the photo on the left. By moving the barricades back this will allow you to shoot xenomorphs who are attacking them.

Barbed Wire

Barbed wire is a string of sharp metal that will harm and prevent xenos from pouncing over barricades once attached. It also gives a small health boost to the barricade itself.

Barbed Wire Tactics	Description
	In the picture you'll see that the engineer was killed due to the xeno being able to pounce over the barricade.
	Due to the engineer placing barbed wire onto the barricades the xenomorph was unable to jump over.

FOB Space

How To: Fob Space	Description
	This is an example of what not to do when constructing a defensive position. In the picture you'll see that the FOB has very little space for the marines to move around in which will lead to: Friendly fire. Shuffling of positions. Preventing wounded marines from entering. Hindering the movement of supplies.
	This is an example of what you should do when constructing a defensive position. In the picture you'll see that the FOB has ample space to move which means: The reduction of friendly fire. Less shuffling of positions. Ease of access for wounded traffic. Free movement of supplies.

Fixing Breaches in Defences

Fixing Defensive Breaches	Description
	This is an example of what not to do when attempting to fix a breach in the defensive line with hostiles nearby. In the picture you'll see that this is a highly dangerous and ineffective way to fix the breach in a defensive line if hostiles are nearby. This will let you get slashed up by an alien running up willy nilly, and will give you less time to react if multiple xenos decide to push the defensive line.
	This is an example of what to do when attempting to fix a breach in the defensive line with hostiles nearby. In the picture you'll see that it shows the optimal way of repairing a breach in your defences if xenos are nearby. To perform this fixing manoeuvre, you'll want to: Build a barricade a few tiles back, Screwdriver the freshly built barricade, Wrench it, to allow it to be moved, Pull the barricade (Ctrl + Click or open up the right click menu) and then pull it to the tile below you (By clicking on the tile), and then finally the breached tile as demonstrated in the photo. This will force the xenomorphs to run into the FOB to attack you, and put themselves at risk of death due to being in the FOB. This method takes much more time than the above one, however, the safety gained from doing it is worth it's weight in attachments ten times over. If there are no hostiles at all, building it in the normal manner is perfectly acceptable.

Misc. FOB tips

Fob Tips	Description
	In the picture you'll see that it demostrates that windows, even if reinforced, are not an acceptable replacement for a line of all-american steel barricades. Windows as a defence: Provide no firing lines Are Weak In summary, avoid using them as a defence.
	Barricades will end up damaged due to the ravages of war and incompetence, and if it isn't horribly damaged, you'll be able to use a blowtorch on it to repair it. This works on metal and plasteel barricades.Note that if a barricade is too damaged you will be unable to fix it. Each time you repair a barricade it will consume one unit of welder fuel.

Your Skillset

To find out about how the skill system works head over to the skills system page.

Tips

• Don't hoard loads of building supplies otherwise you might find fellow Squad Engineers unable to perform their jobs.

Guides

[WIP] Useful FOB engineering 101 by Challenger on 22 Jul 2017