I barely noticed any weapons having acid damage on them. It always seem the most useful damage types were armor piercing, explosive, and energy followed by a good amount of psionics.



Where does that leave acid guns and weapons? Is there a specific enemy type that are weak against acid? I found that robots are weak to explosives, and certain enemies are weak to apiercing. However, take into effect, energy weapons are good at nearly everything. To be honest, I would say acid should be useful against rock guys like king rock. But thats just an idea. Any thoughts on this for PS2?

For the sequel I have this in mind:

http://i.imgur.com/uuEIw0c.png" style="max-width:100%">

Of course everything is still work in progress, that is the general idea I have right now. Need to ask coder first about the implementation of all those damage types

As you see acid should be some kind of bonus against all enemies. I might take Borderland 2 approach though (must copy from the best games!) and have acid damage enemy armor in general over time, might be an interesting variant.

And I agree there should be some weak type of enemies for each damage type. I think the kind of enemies present could be grouped in: organic, robotic, mineral (? like the Matrick) and maybe fluid/ethereal.