These are strong high-tech weapons with a splash and energy-based damage. Most of the plasma weapons belong to some other class as well; like a plasma pistol, a plasma rifle, etc. Plasma weapons never malfunction, they aren't that heavy, and their damage is decent. Arguably, they are the most powerful weapons in the game. One of their weakness is that weapons with splash can't have critical damage or penetration, which overall limits their DPS. Another weakness is that at the beginning and the middle of the game you often don't have enough damage to destroy spawners quickly, thus you may experience overwhelming and die early. Also, some monsters have very high resistance against energo-damage, but it's not very common. Special perk Plasma Boy improves a number of stats for weapons of this class.
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