Halo: Reach

Download this gametype, and play with a second controller or a friend in a custom game:
http://www.bungie.net/Stats/Reach/FileDetails.aspx?fid=14838...

Just have one person pick up the flag, and place it in their zone. Now, the person getting the achievement will take it from the other base, and put it in their zone to score. Do this twice, and the achievement unlocks in-game. The best map to choose is Countdown.

Note: This method will only work if you play this gametype (download), and NOT built-in stockpile that the game comes with.

Update: As of August 19, 2012, this method still works

When this DLC released, Bungie created special achievement game types on their website to make this easy to boost. Some people have trouble downloading these from Bungie.net, so I put them on my File Share along with a custom map to make things go quicker.

From the menu, select File Browser, New Custom Search, File Share Search, then enter my gamertag (Demonex Machina). Download "Stockpile" and the map "Defiant DLC Achievements" (For all three Defiant Map Pack achievements, download everything).

With a second controller or a boosting partner, go to Custom Game, set the game type and map (The map is a Countdown variant) to the ones you downloaded and start the game.

Have your second controller or boosting partner grab a flag and toss it into their receptacle. Then, with your account, take the flag and throw it into your receptacle. Wait a moment for the flag to score, then repeat the process again and your achievement will unlock.

Ace Chewie Private Messaged:

You CAN win all of the defiant dlc achievements in CUSTOM GAMES!
Simply download this gametype to your xbox from bnet and load it up on reach:
http://halo.xbox.com/en-us/haloreach/PancakesLP/fileshare#%2...
[This gametype will work whereas the in-built stockpile gametype will not]
So grab an extra controller or a mate and have at it =D (Thanks Joda X & Maka91!)
All credit for this youtube video demo goes to OpTicNiko.
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[!] You must capture 2 flags from the enemy capture zone over the course of the game, you do NOT have to capture both within one flag reset [but you can].
[!] This does NOT have to be done on a defiant map [but can be].

This is how you do it legit for if/when they patch the custom games...
|> Load up team objective [preferably] or BTB and vote for a Stockpile game variant
{All three of the defiant dlc achievements can be won in the team objective playlist}

- Once in a matchmaking Stockpile game, make your way over to the enemy capture zone [a glowing ring on the opposite side of the map from where you spawn].

- Wait for the enemy team to drop a flag into their capture zone and walk away to get more.
- Then, like a ninja, pop out and take said flag by standing over it and holding (X) [by default] and take it all the way back to YOUR team's capture zone near where you originally spawned.

- Now it's your decision;
either hold the flag until the timer reaches 5 seconds and then drop it in the cap zone, beating down any enemies while you wait
[OR]
drop it in the cz straight away and then gaurd it with your amazing skills
[OR]
try your luck by droppping it in the cz and going for the second straight away - trusting your teammates to gaurd it or the enemy to simply not be interested in it [ill-advised].
^NB:
the first option will not mark your flag on the enemy players' HUDs whilst the second and third option will.
Your choice.

- Rinse and repeat once more and say hello to some gamerscore.
Poet and I don't know it?
Perhaps.

NOTE:
~ You can also get a stockpile game variant in the SWAT playlist
~ Be wary of defensive players who camp near their base [usually with a shotgun] and pounce when you take one of their flags.
~ Don't fall for the classic n00b behaviour of mistaking the enemy's capture zone for your own and then massively helping the enemy team in doing so. Yours is the one you spawn near. You'd be suprised how often this happens.
~ The flag has an instakill melee ability so watch out for enemy flag carriers and use tight spaces to your advantage when you're carrying a flag yourself. Bait enemies in, dont run at them like a madman brandishing a flag as this will get your ass killed :)

Don't worry stockpile haters, this cheevo is much much easier than the 'You Ate All the Chips' one...

Hope this helps
Happy gaming

coreymawf

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All credit for this youtube video demo goes to OnyxMovies117.

For this achievement you don't actually need to have the DLC, only the noble map pack for the stockpile gametype.

You have to take 2 flags from an enemy capture zone during matchmaking or custom games, you can do them individually and on different capture rotations, e.g. taking one, then capturing, and repeating.
(You do not have to capture the flags at the same time)

This is the gametype for custom games.
http://www.bungie.net/Stats/Reach/FileDetails.aspx?fid=14838...

Alright players you can save your money and you don't actually need this reach download stated above. I got this achievement today in countdown in team objective by returning a flag in the different sets it doesn't have to be the same set of flags and completed in 1 go, so take a breather and do not panic if you just get 1 and remember its not over till all three sets are finished. Just keep a close eye on the territory and when its having a flag brought to it if it is one player there thats the chance to swoop in clean up the flag carrier and take it from the territory. The flag carry method "jump,throw, & pick up" is not the best way to do this because one of your team mates can pick up the flag your carrying. Its not to difficult to do in team objective. Countdown map is proffered =) I hope this helps players who don't have it.