So, we played a game with the Death Breath faction yesterday and stumbled onto a missing piece in the ruleset. The "Grippers" have a symbol on their tiles, that isn't explained in the basegame, nor in their own expansion rulebook. There's just a keyword noted: "Rotation". As we seem not able to find the rules for this symbol by ourselves, we wonder, if someone else can point us to the source of this specific rule.
Isn't this feature covered in the base game's rules ? I remember reading about this there when I first opened the game...
If so, it's not in all editions of the base game. None of the 4 original armies have rotation, and in the game as I first opened it, rotation is unmentioned.
Some later edition(s) of the base game include Doomsday Machine, whose HQ has the special ability to rotate one of their units, so one could guess from that what a unit which itself has the rotation symbol printed on it means.