u can use blasters underwater in jk1
u can use the rpg and a few others(det packs, grenades) underwater as well in HL
if u fire a blaster from outside the water, the shot got something-or-other-erized when it hits it, deflected somewhere else.
sabers are waterproof; u get a noisy hiss when underwater...i read that somewhere...
?siht daer siht uoy naC