DngrsDrrn wrote:
I've built quite a bit of Laser Rifles and Heavy Lasers. My guys can take down aliens in 1 or 2 hits usually, but as of yet I've only encountered those purple aliens and the ones that look like they walk on all fours. I learned quick to spread out ASAP.
The power sources explain a lot. I didn't realize I had to grab those, and after looting some purps off of dead aliens I realized I needed alien power sources and some weird minerals. Now when I shoot down the UFOs I won't leave them be.
I'm guessing the downside to tanks is that they can't go indoors, right? Why not just get a crap ton of them (other than cost) and roll over everything?
Spreading out is definitely important. Actually, if you start in a corner, you're at a big advantage because the aliens can only shoot you from 2 directions instead of all 4. However, it keeps your units more clumped together. I tend to only bring 6 people out on my first turn if I'm starting in a corner, and just move the other 4 closer to the ramp inside the Skyranger. Some people like to have their guys in back throw smoke grenades before anyone moves, to give cover as you deploy.
You don't need to pick stuff up to loot it. If you kill or subdue all the aliens, all remaining items are automatically collected, including UFO parts. So if you see an unexploded power source, just don't shoot at it.

Tanks can't go inside UFOs, and they take up 4 spots in your Skyranger. Usually 1 tank and 10 soldiers will do the job, but some people prefer 2 tanks and 6 soldiers. 3 tanks and 2 soldiers doesn't give you enough firepower or area coverage IMO. Wait until you can build your own UFOs and you'll get more space to bring more tanks.

Tanks also can't throw flares, which sucks for night missions. Flares are reusable, so just bring 10 on every mission and you'll recollect them at the end. You can also pick up a thrown flare and re-throw it if you need. But I recommend avoiding night missions whenever possible.
You
can blow a hole in the side of a UFO, but the only weapon powerful enough is a Blaster Launcher (which is a guided missile with waypoints... pretty awesome). You won't find Blaster Launchers until you assault an alien base or battleship, or until they assault your base.