Industrial Warfare is a tekkit version of the Hardcore Darwinism server which is based on the concept of a maximum difficulty world with unrestricted pvp. , greifing, theft, destruction is encouraged. Mobs hit harder, hunger degrades faster and the players are ruthless.
The mod can be found here
make sure to set the launcher to "tekkit" when installing (banner up in the corner)
The server supports several commands. Some of which are:
/tpa name (request a teleport to a player)
/tpahere name (That they teleport to you)
/break (to break IC personal safes)
Hacking and cheating is not allowed.