I suddenly noticed that most of our Sci-Fi weapons are pretty much re-skins of each other when it comes to functionality (AKA the fusion guns, plasma rifles, charge weapons which all explode and set fire while using different ammo) or behave more or less like average projectile weapons with insane stats and/or nifty visual effects (laser weapons, railguns). Surely we can do better than that!
This is what I came up but you are free to give your own suggestions!
(The names are terrible, but its the concept what matters)
Microwave rifle (due to the lack of a better name):
A compact and meaner version of the real Active denial system. It fires a 3 tiles wide invisible beam in the direction of your choosing, which depending on your setting (kind of like the burst fire option) could: Stun the first creature it meets just like the ADS does, should only work with creatures capable of feeling pain; cause severe burns (aka just damage) or set fire to the first 3 creatures that cross path with the beam; or at the higher power consumption instantly create a raging fire in the first obstacle (terrain, furniture or monster) that meets the beam. The gun should probably be powered by an UPS.
What happens when you back up your standard microwave magnetron with the POWER of the ATOM and slap the result on a two by four? Well I am not sure, but it surely involves melted corneas and horrible third degree burns.
It is the improvised version of the Microwave rifle mentioned above, limited to a one tile wide beam and to the stun and basic damage fire modes.
The X11-Marauder accelerates a toroid of plasma at a significant percentage of the speed of light which explodes with devastating effects when hitting its target. Or without copying Wikipedia, its the equivalent of a rocket launcher, just that whatever is unlucky to be on the wrong side of it gets completely vaporized without trace. The projectile should just keep obliterating everything it touches until touching the edge of the reality bubble. Creating a nice escape route through whatever walls were there.
Should probably deplete a whole canister of hydrogen per shot and something like 100 batteries.
Have you ever burst shot a M249 in game? Well this weapon does basically that, just that it creates a fire on every tile the bullets land on. It just some sort of futuristic flamethrower capable of melting tanks in half. Works on UPS and hydrogen.
The energy beam fired by the dimensional translocator creates thousands microscopical dimensional rifts on the surface it impacts these dimensional rifts then proceed to completely rip the object as small chunks of it are chaotically teleported. Result, the weapon works similar to the floating eyes destruct walls attack, but only destroying the first surface it hits. When aimed against a monster, the result is always ludicrous gibs. ALWAYS
Powered by plutonium cells directly just like the teleporter.
Well those are the first things that came to mind, they all seem like fun weapons to use.