Half Life 2
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.
The zipped version of GraviNULL Open Alpha: a1.0 For those that prefer zipped files over installers.
The installer version of GraviNULL Open Alpha: a1.0 Simply run and click next a couple of times to install it. Afterwards restarts steam in order to make the mod show up on your games list.
The server files required to host a dedicated server for GraviNULL.