The aliens, and a Tau Fire Warrior.◊Note that, A. they are both yellow-armored military aliens with B. a fondness for More Dakka and C. similar helmets.They both have legged walkers as transportation and assault drones. Although the Tau have different colored skin and blood, in 38000 years, they might have changed somewhat.
- The Tau aren't aquatic, the aliens wear neither helmets nor armor, and the Tau hadn't even invented fire in M2.
If the ARG is to be believed and the aliens really have another thirty million soldiers heading in, it's a little odd that they bothered with their initial assault at all; at the very least, they would be able to march troops up and down more of the coastlines of the countries they're hitting rather than just taking a few major cities. The oceans shouldn't even be much of a bottleneck, since they use existing sewers and canals to funnel water behind the frontlines so they can use it to resupply. They've either done enough recon to expect that this infrastructure is in place or they took a glance at Earth from above and figured this infrastructure would be in place based on our level of development.
If they need water so badly that the ocean level drops in less than a day, it may be safe to assume they're on their last legs (or tendrils.) The Marines notice that their rifles are surgically attached to their arms, one going so far as joking "now that's commitment to the cause." They're clearly not a Hive Mind, but they could be a society driven to military dictatorship due to scarce resources.
This could be why the aliens, despite their advanced technology, are not invincible; they've lost much of their own military capability due to lack of resources and much of their population in their own resource war before finding Earth.
Corollary: a future installment will address the problem of astronomers discovering a multitude of water-covered planets in the galaxy not by taking the obvious way out of saying that the salt content in Earth's oceans are what makes it attractive to the aliens, but by having the aliens be so desperate that distance was the deciding factor and Earth was simply the first one they found. Peace is brokered with an exchange of this information so they can go find other fuel sources. Unfortunately, it turns out that they didn't have the patience to look further than Earth because they're already at war with something even worse and losing; to add insult to the invasion, humanity can choose to either watch the invaders get curb-stomped only to be destroyed next, or suck it up and form an actual military alliance with the original invaders to give them the manpower they need to rout their own enemy.
- Adding to this, this may help explain why their tech looks and acts the way it does. Their weaponry and vehicles look very roughly-designed, almost as if they're partially cobbled-together.
- Jumping off of that. They could have been a colony ship or something that was forced by some circumstance to act as an invasion force, forcing them to MacGyver all their soldiers, weapons, and equipment from scientific, mining, or other colony building equipment. That would explain why they would have a good understanding of basic combat tactics, as any advanced civilization would have to have some concept of combat, but didn't just overwhelm the humans. They are technologically advanced and hardly stupid, they obviously learn quick, but they simply aren't battle hardened.
- I don't want to be a hole-puncher, but if they're looking for liquid water, what about Europa and Encaladus? Both of these would have been ON THE WAY to attack Earth.
- Earth has easily accessible liquid water on the surface with hospitable environmental conditions so the aliens went to Earth first.
- Semi-confirmed. The director has said that "[t]hey are a desperate power who is here under high stakes circumstances".
- Fridge Brilliance. Many skyscrapers are used to broadcast TV signals, so in a way they were. Much in the way we tracked their C&C center by it's strong RF signals, it's not unreasonable to think that in a big urban center a skyscraper with a powerful TV antenna on it might be one of the most powerful obviously artificial electromagnetic signals to be found, and therefore not a totally illogical target.
- If they were taking deuterium out of the water that would make sense.
- The initial invasion is an army of misfits, not clones. If they are desperate refuges from a Crapsack World perhaps the first wave is convicts, political dissidents and lower tier troops. The kind you could send to die on a low tech planet just in case it's a Death World. Hence the cobbled together tech, cybernetic weapons and the drones. The cybernetics could just could be how they fight. The aliens has medics and in some scenes they'd drag fallen comrades to safety (clones wouldn't necessarily need to do that). Since we found their weakness, they next wave is the Elite Mooks.
- This makes sense to me. It seems entirely possible that the aliens are xenophobic or scared enough to try and wipe out any advanced species they encounter (Or maybe they just watched Starship Troopers too many times) and the reason the water drops so quickly is it just happens to be a convenient fuel resource for the aliens to use in an effort to exterminate the extremely violent and aggressive natives. It's not a standard invasion so much as a poorly thought through act of panic. I would also laugh hysterically if the sequel said the whole war was all Paul Verhoeven's fault.
.. to save their main Homeworld from the aliens from Skyline. Their Homeworld is under attack and the main fleet is fighting to hold off total planetery assimulation. The group hitting Earth are on a mission to Spawn as many soldiers as they can as use the raw resources to outfit a rear guard action to save as many of their people as they can. They are using Earths water as a huge spawning pool. Thats why their weapons fire naplm like rounds to prevent their enemy regenerating. They know what they are doing is wrong but consider it a lesser evil considering the enemy is heading to Earth anyway...
- Horrific cybernetic enhancements: Check
- Kidnapping indigenous population: Check
- Energy Based weapons: Check
- Drones: Check
- The guys we see must be that last species they conquered. So they either ran out of them, or humans are better in some respect. Now we just need to know where Bitterman is.