The Security Cube is a device in Planet Strike. Destroying the cube is the player's main goal in each area. It is destroyed by locating and detonating the fission detonator. Once it has been disabled, the teleport unlocks the warp to the next area.
The Security Cube resembles a rotating red cube inside a column. All other weapons besides the detonator have no effect on the cube. It is not known exactly how the cube is linked to the operation of the teleports to other areas; it may contain the power to run the teleports, or simply be a like a link in a circuit.