Supply Crate

Supply Crates are the general way of getting health, ammunition, and energy in the Half-life universe. They can be picked up by the Gravity Gun quite easily and can be destroyed by a crowbar in one hit. You should not be confused with a supply crate and a normal crate this confusion can be a waste of time and death in certain situations. The easiest way to notice the Supply crates are that they are unusually small compared to other crates and have a yellow stamp on them. The supply crates are also needed for the "Lambda Locator" achievement in Half-Life 2 and the "Cache Checker" achievement in Half-Life 2: Episode Two.