Alien Buildings And Combat Tactics

Overgrown fungus buildings... but no fun once inside!

Alien Dimension Buildings

The aliens have ten strange structures which seem to be of an organic design. They are all invunerable to damage.

A building's mission objective can only be completed once since it will self-destruct at successful completion.

The only way to destroy the organic structures is by ground assault with a large and heavily armed X-Com strike team. Attacking the fungus growths with craft weapons does not achieve anything.
Each oversized fungus must be researched to understand its purpose and importance ...and when troops have landed at each growth, a brief is prepared outlining the mission objective so that each building can be disabled.
Once an objective has been completed a message: "Building has been disabled" appears. The mission completes if no more hostiles are present. X-Com troops can hunt down the last remaining aliens or escape via available blue-exit-tiles to force an end. There is no rush to escape! The alien building remains structurally sound once it is disabled.
When returning to the alien 'cityscape', the building automatically starts to collapse. Do not launch your craft immediately since they may be damaged from the still self-destructing building. Return to Mega-Primus at your leisure!

The Sequence

One building chamber can only be attacked at any time. Once one growth is destroyed, a new research topic becomes available back in Mega-Primus.
1. Sleeping Chamber
2. Food Chamber
3. Alien Farm
4. Maintenance Factory
5. Incubator Chamber
6. Control Chamber
7. Spawning Chamber
8. Organic Factory
9. Megapod Chamber
10. Dimension Gate Generator

Internal Features

Alien plants which have a reaction to destruction and are not mission objectives. Other biological growths do not have any battlescape effect. Area-of-effect is typically a radius of two except the large barrel with Stun Gas effect having a radius of nine. Not all are pictured: explosive acorn (pedestal and overhanging), rotten egg, pink pods, ...

Image to scale.

Orange Re-Inforcement Pads

Alien Squad Re-Inforcements

Aliens present within their structures are able to travel via their 'people tube' network. Any building which comes under attack by an X-Com ground force will prompt the alien horde into sending unlimited assistance to the beseiged building via the orange square-shaped devices found within every alien building battlescape. todo: chart: overview of all aliens spawn+qty of each building (as mentioned here to do list

Combat Tactics

dump: cutting ramps near orange pads to funnel spawns into a kill zone, integrate orange-pad temp page to here somewhere

text dump from "Tactics" page. -one place not three!

Alien Dimension: Buildings

The Alien Dimension is a dangerous place for X-Com craft. For craft combat: Don't Get Hurt Shot Down.
The structures/buildings in the aliens's homeworld: Alien Dimension will become accessible to X-Com once the research has been completed. The buildings and 'people tube' in the alien's homeworld are biological in construct (growth?) and are invunerable to damage.
The oddly shaped structures each have a purpose which, discovered via research, will allow a craft with troops to land and infiltrate their buildings.
Do not move agents from a landed craft into the building.
A large X-Com force is preferable (+16 agents) armed with the best. To start the building assault once landed at a building, select "Investigate Building" or "Raid Building". Both buttons do the same thing.
To complete your objectives, all of the targets outlined in the Briefing must be destroyed. The message bar will display "Building has been disabled". To finish, evacuate the condemned building via the exit tiles or kill off all remaining aliens.
The "orange pad" terrain feature found in most buildings is an alien device for re-inforcements to arrive at regular intervals. The orange pad device is robust and can only be destroyed by Vortex Mines (or accidently by the Queenspawn). To halt such re-inforcements, all orange pads present at one device must be destroyed to disable it.
Each alien building will collapse at successful completion of the battlescape mission.