XCOM: Enemy Unknown Cheats
The speed of the crystallids will mean you still lose a few, but much less than overwatch-hopping like you normally would.
I have a special squad for terror missions, consisting of mostly support class, because they have the +3 move bonus trait.
I noticed this. In all other missions works fine but in terror missions it can't seem to find the soilders info or edit them or moves. Thought it was just my luck.
You can follow the steps in this thread to edit your soldiers' movements and other fun stuff.