Phased Object Creation and Deletion

Invasion is a phased game type and has some interesting options for the creating and deleting objects based on the current phase of the round.

Gated Objects (Phased Deletion)

A gated object will be deleted after the specified phase has been completed. Warning: this can have strange behavior on vehicles and weapons.
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Create or hover over the object you wish to Gate.
Press X to edit the objects properties
Select the Advanced Option and the Game Type Label property
Change the value to INV_GATES
Change the Spawn Sequence property to the last phase the object should be active (i.e. if the object should disappear after phase one, set the value to 1

Phased Objects (Phased Creation)

A phased object will be start spawning once the specified phase has started.
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Create or hover over the object you wish to Gate.

Press X to edit the objects properties
Select the Advanced Option and the Game Type Label property
Change the value to INV_WEAPON or INV_VEHICLE
Change the Spawn Sequence property to the first phase the object should be active (i.e. if it should appear at the start of phase two, set the value to 2)

Something to consider with phased objects is spawn time. Phased objects do not immediately appear on a round change, they must spawn in. The shortest spawn time is 1 second; do not use "Never" as they will never appear. For weapons and vehicles this is a problem as a short spawn time will mean that the vehicle or weapon will constantly respawn.

The only difference between INV_WEAPON and INV_VEHICLE is that vehicles are given a way point at the start of the phase.
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Do not setup any objects with the invasion_cinematics label, as all this data will be deleted on custom maps by default
Do not assig the INV_PLATFORM label to anything as it is specific to the Spire elevator lift that is activated in phase 3 of Invasion: Spire
When working with phased objects do not set an object spawn time to never and place at start to false. If you ever reload the Forge map the object will be lost.
The Assault/CTF Invasion phases are incompatible with the game option "Disable Weapon Pickup" as it will also prevent players from picking up the bomb or flag.

And that's the end of our handy dandy little guide to Forging Invasion Variants. Hopefully, it's not too complex, but if all this went way over your head, fear not, we're already prepping some content designed to get you up to speed with the more basic fun and functionality offered by the Forge.

Stay Tuned
Source:Bungie.net