Powerhouse was formerly utilized to provide alternative power supply to the rural settlers nearby, but has now been repurposed to support the military war efforts. The map is primarily designed for 4v4 gametypes and appeared in the Grab Bag and Arena playlists during the Halo: Reach Multiplayer Beta.
The map was known as "Settlement" at some point in development.
Like almost all Halo: Reach multiplayer maps (excluding Forge World), the map was re-purposed from the campaign, although the campaign level takes place at night instead of day in the level Nightfall.
Powerhouse's art style and environmental layout is very similar to that of Halo 3'sHigh Ground multiplayer level.
The water in the small reservoir at the back of the map acts differently than other bodies of water in the game: grenades and bullets land and impact as though it is solid ground rather than water, and do not create a splash effect
If a player stands near the computer in Green Residence, a whine like a malfunctioning computer can be heard.
The bridge which you cross to get to the map in the campaign mission, Nightfall, is out and appears to be destroyed in the multiplayer map.
In forge, you can change the color of the dumpster, pallet, and large pallet.