Half-Life 2 Mod - GraviNULL Version b1.1

The grapple function can attach to the numerous mines floating about the map and fling the player around, the player must kill the enemies by punting the mines at enemies, normally the mines give off a minor electrical shock, but when they are punted they become supercharged for a while allowing them to cause lethal damage.
In GraviNULL, the player will be put in a Zero Gravity situation with no means to move around besides using a modified gravity gun with a "grapple" function.