Energy wall

An energy wall is a piece of Covenant equipment attached to deployable lookout towers. Functionally similar to the anti-vehicle barrier, the two pylons generate a wall of plasma energy that prevents both infantry and vehicular access from one side to the other. However, weapon gunfire can still penetrate the wall, making engagement across the wall still possible.

Gameplay
The energy wall appears exclusively in the Halo Wars Skirmish levels Tundra and Fort Deen. It is activated when infantry units are garrisoned in the adjacent deployable lookout tower, generating an impassable energy wall that prevent ground units from getting through. Units across the wall can still attack each other. Like other garrisonable structures, it provides defensive bonus to the garrisoned units, but deactivates when the garrisoned unit is killed.

List of appearances

 * Halo Wars