Catachans/Deathworld Vets

One of my first loves.

I intend to look at this as a proper Deathworld codex as opposed to a IG Codex variant. Got some ideas hiding in the loft somewhere so I will try and dig them out. In the meantime thoughts and ideas.

I think I've told you my opinions before, but I'll rehash for others.

Deathworld Vets should be all about ambush. Traps, infiltrators, scouts, minefields, poisoned weapons, snipers, assassins, difficult terrain, dangerous terrain, and flamers. Punish your opponent for going into cover. Goad strange war beasts to battle. Leave the lumbering tanks at home and bring enough melta bombs to wipe out the dinosaurs again.

I think Catachans and their ilk should be the best hunters the Imperial Guard has to offer and, on the tabletop, provide a completely different playstyle in comparison to their human brethren.

It would be nice to open it up a bit. Deathworld Vets can represent elite troops in a variety of terrain and environments. What would be handy is a list of possible Deathworld planet variants eg:
Jungle
Ice
Desert
City/Hab
Civil War
Forest

Others?

Would you use the habitat rules to characterize units or to alter scenarios?

So you are thinking I set of rules where a keyword changes how the rule works? eg: the unit may ignore <keyword> difficult terrain while moving. You can then replace keyword with Ice or Jungle or whatever you are thinking of. of corse it would need t be worded way better than I have done here. But I hope you gat what I am asking. But if you are thinking a slightly diferent ruleset for each world then lets work on all as a seperate codex. Can all bo done togeather, but final result will be diftent lists.

I think there is a variety of ways this can be done. For me something that leaps to mind is a trait like theme section before the army list. You choose your deathworld and the "traits" are picked for you. Cost is already incorporated into the models so the "traits" need to be balanced.
A second is to have a bit of a monster army list, but have army restrictions within the unit description.

Cind of like a Chaos codex and old Marines Codex wraped in one? Could work. Big all in one codexs. Give it a go and if it seems too much then we can break it down later.