"Power weapons" refers to any type of weapon that is particularly strong or effective, often capable of causing a lot of damage or having special abilities. Full definition
Pick your character and blast away at enemies with a high powered weapons arsenal. (ign.com)
Left or right, left or right, until you get to the end... be sure to bring a wide variety of elemental - powered weapons with you! (blogs.sega.com)
You will literally only get these four types of weapons, so you will want to sell and dispose of lower power weapons as you pick up more powerful versions of them. (gamingenthusiast.net)