This is my second map using Reach's Forge editor. This is a small/medium symmetrical map called Ventilation and it's designed for 4v4 competitive TS/Flag play.

The name for this map came from the vents that can be taken to sneak into each teams base. There's basically 2 vents in each base that can be taken by jetpackers for alternate routs. The video and pictures below will show the map better than i could ever describe.

Thanks for looking!! If you decide to download Ventilation and get a chance to play, PLEASE let me know of any issues that you might notice during gameplay.

YouTube - Ventilation
Weapons

6 x DMRs
1 x Needler
2 x Needle Rifles
2 x Plasma Pistols
2 x Plasma Repeaters
1 x Sniper Rifles
1 x Rocket Launcher
1 x Grenade Launcher
2 x Shotgun

Grenades

8 x Plasma Grenades
6 x Frag Grenades

This is an overview shot showing the entrance to red base. The entrance is at the top left where the water goes under the rock arch. Blue base is identical and can only slightly be seen at the bottom right of the picture. To the left is a hall that connects each base, but it can't be seen in the picture. Also, the round roof with the purple light shining through has a man cannon that shoots you up to the top of center tower.
http://img502.imageshack.us/i/overviewv.jpg/
This shot shows the center building and what i call the battle hall. The battle hall is where you see the yellow light, and that connects each base with both a bottom/top entrance. The bottom entrance is a rocky area filled with water. One of the 3 entrances can be seen at the center/right of the picture.
http://img151.imageshack.us/i/outsideredbase.jpg%3Cbr%20/%3E%0A/
This shot shows the battle hall that was cut out of picture 1. Another entrance to the underground waterway can be seen at the left/bottom of the picture.
http://img194.imageshack.us/i/battletower.jpg/