OBSTRUCTION V2
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Recommended gametypes Slayer, CTF (Capture the flag), KOTH (King of the hill) and assault.
Forging 101:

[ ___ ] __Floating Objects
[ ] __Instant Respawn
[ ___ ] __Immovable Objects
[ ___ ] __Timed Map Events
[ YES ] __Effective Spawn Placement
[ ] __Gravity Lift Techniques
[ ___ ] __Objects Placed in Water
[ YES ] __Used Symmetry Option
[ YES ] __Interlocking Objects
[ ___ ] __Objects Merged with Map Geometry
[ YES ] __Unlimited Budget Glitch

What I have changed.
I have got rid of the tunnel idea and edited it as you will se below also I have added sheild doors and opened up the map itself around where the tunnels were.

STORY
This temporary stronghold was used for the covenant to defend against UNSC. But the UNSC mach blasted the area until they thought it was destroyed. When the UNSC came back it was a mistake, they did not want to do again. They were slaughtered when they returned, by squadrons of rebels. It set them back for years Since then this place has been a place of war. Not peace.
Now it has been recreated to suit all needs but not for the rebels for the UNSC

Weapons
Assault rifle x2
Battle rifle x4
Shotgun x1
Sniper rifle x1
SMG x4
Brute spiker x2
Needler x1
Equipment
Power drain x1
Regenerator x1
Frag grenades x8
Plasma grenades x12

PICS
bravo side new

bravo base new

bravo base tunnel old

bravo base old

alpha side new

alpha base new

alpha tunnel old

alpha base old

middle from bottom new

middle from top new