I hate reaction fire from aliens :angry:. Many of my best troopers has been lost that way, so I now send rookies first into whatever it may be; doors, elevators, stairs. Once the rookie spots the aliens, the veterans open fire in pure Full Metal Jacket style; tear down entire buildings to destroy their enemy. Works every time :D.

To go up or down in a lift, you can also use the two buttons on the far left (representing a person next to an arrow pointing up or down).

I prefer using MC'ed aliens (carefully disarmed of course, including any grenades they were carrying, and don't try this with aliens with psi abilities) to draw reaction fire.
To strip buildings, I always use laser rifles. If the soldier's firing accuracy is good, snap shots work fine. If his/her firing accuracy is only so-so, auto shots can sometimes be a much faster way to strip away an entire wall.
Also, there are typical places in barns where most aliens can be found (just at the top of the stairs, in the top-right corner of the top floor,...) Sometimes I even shoot those spots with lasers, even if I can't see anyone inside from a distance. You will notice the alien however if you manage to kill him that way.

Tearing down walls should be used with great care if there are Crysalids on the site, sometimes a hole in a wall on the second or third floor will work as a shortcut for them.

I am just curious:
Survived one of your soldiers EVER chrysaldis attack?
(I mean it attacked and your soldier didnt turned into zombie...)

I don't think it's possible. The damn bastard injects an egg into you right away :angry:.

Yes, I also think its attack always works from the first time.

I've also noticed that it has hand-to-hand combat that can damage tanks :wall:
Zombies have a similar attack, but probably not as strong (one of my men once survived 4 consecutive zombie attacks without sustaining any damage. the 5th attack however killed him instantly)

Since no zombie has ever survived getting within ten squares of my troopers... Does their attacks turn humies into zombies as well?

It just killed my soldier, apparently.
Sue me... since the first attack didn't do any damage, I let my soldier focus on shooting the remaining aliens first... until the zombie killed him :whistle:

It is not impossible to survive a Crysallid attack, I have done it.

Just put your soldiers ON THE FLOOR with Flying Armour, it's so strong that sometimes they don't get through it.

Note: This is not as easy as surviving a Lobsterman HTH attack in TFTD, though. That you can do with no armour (you can also stun the aliens easily using that).

Well, a hint for survival against chryssalids.

:rifle: them before they :Titan: you.

Why?I stunned two of them with stun rods... :angel:

Hey I got idea for REAL CHALLENGE
Finish TFTD just with starting human weapons... :evil: