Did any of you ever play Perfect Dark years ago? There were some cool weapon ideas in that game, some would be great in this game.
examples
The Mauler is the standard Skedar sidearm that is carried by almost all Skedar Warriors. It has a crude design but is an effective weapon, it fires out heavy laser blasts that can take down even a Skedar with only a few shots. The secondary fire charges-up the gun's energy and once fired, it can eliminate any target in one shot. The charge-up function will drain ammo before it fires, so care must be taken to save ammo.
The Reaper is the most inaccurate and messiest weapon of the game. It has been deisgned for use by large creatures - Skedar Warriors, so humans and Maians will find it difficult to aim the weapon properly. The primary fire will spin the three blades of the weapon and while they are spinning, small lethal shards of metal will fire out at a very high rate, and although it is not an accurate weapon, it is enough to mow down any enemy in front of you. The secondary fire will spin the blades around so that they can be used in close-combat to chop a target to bits.
The Cyclone has been designed not to be accurate, but to have a lot of power, and its 50 round clip certainly tells you that this is one gun you wouldn't want to come up against. The primary fire shoots standard rounds, but is very innaccurate and has no zoom capabilities, so it is better off with closer targets. The secondary fire will discharge the entire clip once you fire, but it empties the clip much faster than the primary fire and is also extremely innaccurate, but it can be devastating at point blank range.
Another weapon similar to the Crossbow, the Tranquilizer can sedate enemies as well as inject them with a lethal chemical. The primary fire will slowly cause them to become dizzy and eventually faint, and this is one weapon you don't want to be hit by, as if you do, the screen will become fuzzy for a while before the chemical wears off. The secondary fire is designed for close-combat, as it will inject a lethal dose into an enemy but they need to be standing right in front of you, so you may be better off just sedating them.