Just use a knife
Oh hell yeah! Let's make this game more like Pathways Into Darkness :-) (Though, shortly after Pathways, Bungie went on to make an FPS series with a real 3D engine, physics, and pretty sophisticated sound support [for the time], that in many ways combats FPSes today. But that's beside the point.)
Cased ammunition weapons will fire under water because all of the explosive is in a sealed volume so cannot be waterlogged.
True. I was thinking more of the older guns that you'd have to dry out before refiring. Welcome to the 21st century, Undeference :oops:
I may be wrong about the blaster. It seems that a blaster is a different type of raygun from the pulse rifle. Typically, the shots from these weapons are much slower than the speed of light, and not much is actually known about them. How, and if, they function under water is only guess work until our weaponry progresses as far as that of the marines in Tremulous.
Alternatively, these weapons are extremely simplistic, but are not practical in this universe.
I think it's safe to assume that projectiles from energy weapons are very hot. That means they could travel underwater on a "steam bearing"
After reading the Wikipedia article about
particle beam weapons (which supports the lasgun being a hitscan weapon), it seems like the only problem that could prevent the lasgun from working under water is beam generation. Particle beam weapons rely on hydrogen gas, which if I recall correctly from my chemistry classes, is not found in water (hydronium not being a gas and all). This leads me to the conclusion that without extra equipment, the lasgun cannot be effectively used inside water (assuming it is just water).
However, in the case that a lasgun would even function under water, I think you would be right.
The fact that the BS makes humans immune to adv. basi gas implies that it's gastight
The basilisk's gas is only effective in a high concentration but is approximately as dense as air, giving it a relatively small effective range. I think that if the marines put dust masks over their faces (of if it's a contact thing, wore more clothes), that might render the basilisk's gas virtually (if not entirely) useless.
I don't think that's a good indicator of whether a battlesuit is airtight. It just means that the outside air does not readily penetrate it. (The battlesuit might float for a little while before sinking.)