Classic weapons vs. high-tech weapons?

[DoomRater]

It does kinda depend on the quality of acid though. I mean if it's a compound that sets concrete on fire it should definitely work on undead and potentially robots.

[Reactor]

Acid can work on metal and undead, too, it is true. Toxic gases, biotoxin or radiation will not, though.

[Zanieon]

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[MetroidJunkie]

Acid can work on metal and undead, too, it is true. Toxic gases, biotoxin or radiation will not, though.

If the gases can be ignited or, better yet, are volatile enough to explode, it could prove effective against all kinds. Or, if it's a type of biological weapon that can eat through flesh and muscle, it would at least prove effective against the undead since it would make them nothing but bones.

[Ethril]

As much as I love the fancy superweapons and such, I tend to prefer conventionally-functioning weapons (even if they use unconventional ammo; a shotgun is a shotgun, whether it fires buckshot or antimatter.)