Borderlands Achievements

United We Stand

Defeated the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game   

Simply play a co-op game over system-link, Xbox-Live, or splitscreen and defeat one of these bosses. Difficulty will increase, but that shouldn't matter with more than one person.

Rate this achievementAverage Rating (Based on 5 votes)
User Comments
Comment #1 by DezSnaker
Monday, February 21, 2011 @ 01:07:58 PM

Killed (1)sledge, (2)flynt, (3)krom, (4)rakk hive or (5)destroyer who is located in (1)sledges Safehouse, (2)salt flats, (3)kroms canyon, (4)trash coast, (5)the vault. If you haven't unlocked that area yet, complete more of the main quests to uncover more areas. 'note': CO-OP MODE IS REQUIRED TO GET THIS ACHIEVEMENT.

Comment #2 by Deaths Head IV
Thursday, March 10, 2011 @ 04:36:04 AM

Sledge is found in the mines, the key to the mines is in sledgges safehouse

Comment #3 by mp_leeds
Sunday, March 13, 2011 @ 07:16:39 PM

is it any one of these or do you have to defeat all of them?

Comment #4 by OUCat57
Tuesday, March 15, 2011 @ 12:39:11 AM

just one of them.

Comment #5 by Daylightzombiee
Thursday, March 24, 2011 @ 09:44:55 AM

Does this have to be in a single coop.. or just all time coop?

Comment #6 by D1STURBED CLOWN
Monday, March 28, 2011 @ 05:33:57 PM

ive beaten every boss co-op but yet i havent gotten this does anybody know why
that happened?

Comment #7 by SyEcho
Tuesday, May 10, 2011 @ 07:04:12 PM

Beat any of the bosses listed in the achievement by yourself, and NO one else. After Once you've beaten one of these bosses, do NOT "turn in"(or complete) to whomever assigned you that quest. Instead, quit to the main menu, load your game in split-screen co-op(2 controllers required obviously), and by the time you spawn, the achievement will be yours.

Comment #8 by SOKKESNUSERN
Monday, May 30, 2011 @ 02:52:42 PM

i want this achievement can somebody help me?

Comment #9 by Skill Of Kill
Sunday, July 10, 2011 @ 12:54:34 AM

I need some1 to do this. My char wait near hive everything is ready I only need
Some1. GT SkillofKill

Comment #10 by DanjaMOB
Friday, July 15, 2011 @ 10:52:43 AM

@Skill of Kill

You still trying to get this? Send me a message on xbox live. I need this one too.

Comment #11 by mcookman
Thursday, August 18, 2011 @ 12:09:38 PM

does anyone know if you can get this by returning to a boss? I know the bosses respawn if you return to the area after a while

Comment #12 by defaultdotxbe
Monday, August 22, 2011 @ 02:02:35 PM

yes you can get this by returning to a respawned boss

also, it works in local (splitscreen) co-op, so if you have a second controller you can actually do this solo, just leave your second guy at the beginning of the area where theres no enemies and go kill the boss on your own

Comment #13 by pearldrummer788
Saturday, August 27, 2011 @ 05:54:27 PM

Honestly, find a friend. This game is much more fun in co-op.

Comment #14 by mtbingdude
Friday, October 21, 2011 @ 09:43:19 PM

does this not work in playthrough 2? just tried and no achievement :(

Comment #15 by forstar45
Sunday, December 04, 2011 @ 10:48:15 PM

tried on my 2nd playthrough on co-op and no achievement :s

Comment #16 by Babydoll123
Wednesday, December 07, 2011 @ 05:45:21 PM

LISTEN, this is the easiest way because you ca do it ALONE!! Listen,go and beat
a boss for example sledge. After you beat him,leave the place and look for a
save.The best one is just before you leave the map and go to another place.When
you get to the save.after it is saved,get out of the game to the menu.Go to coop
and make the other player connect to your game.When you two appear on to the
game.You will get this achievement.Its easy and you can do it alone.

Comment #17 by GearDoGi
Saturday, January 28, 2012 @ 05:14:32 AM

Any intrested for helping me with this achievment?Send me a message GT: GearDoGi. Thanks a lot anyway!

Comment #18 by Yuri U Barbosa
Tuesday, January 31, 2012 @ 06:16:48 PM

If anyone need this, message me Gamertag: Yuri U Barbosa

I killed Vault Boss on sigleplayer, but when I'm back to the Vault, the Destroyer isn't there, to kill it on coop my partners must be on vaul final mission?

Comment #19 by Kamui024
Thursday, March 29, 2012 @ 11:33:32 PM

If youve killed him already and you help a co-op player still get the achievement?

Comment #20 by LostorLimp
Friday, April 13, 2012 @ 06:33:39 PM

If anyone still needs this achievement i do as well, send me a message, GT: LostOrLimp
thanks a bunch!

Comment #21 by IamNotReaI
Tuesday, July 24, 2012 @ 11:36:04 PM

If anyone still needs this achievement, message me - IamNotReai. Just say "co-op borderlands cheevos" or something.

Comment #22 by TheNarrator23
Sunday, July 29, 2012 @ 04:24:33 PM

Still needs this achievment (lvl 40 hunter). If anyone wants to help me get it, my GT is TheNarrator23

Comment #23 by Mangumm
Saturday, August 04, 2012 @ 01:23:58 PM

strange, it glitched for me, i killed the destroyer solo and then just after credits joined co-op with 2 controllers to do other chieevo and this one poped out :)

Comment #24 by Cooper24
Saturday, August 11, 2012 @ 08:44:03 PM

This was easy! My friends are amazing at this and they helped me, i got all of the co-op achievements (apart from the ones where i had to fight/help them) and I got easy gs!

Comment #25 by RocketSummeRuss
Wednesday, August 22, 2012 @ 07:51:11 AM

On playthrough 1 is there a way to get these respawning? Or should it auto happen if someone else is in your game space, or if you have a dummy account logged into your game space?

Comment #26 by RyanABR94
Tuesday, October 02, 2012 @ 04:04:48 PM

Im currently level 18-19 cant remember which lol but im at the very start of the mines where you kill Sledge. If anyone would like to do co-op with me for this or if someone is willing to help, add me. GT Boothy94. Just send me a message saying "Borderlands cheevos" or something like that :) thanks

Comment #27 by Jwats2010
Sunday, December 02, 2012 @ 02:40:41 AM

I would like help with this one if anyone is willing I have beaten the main game just need some co-op cheevos. GT: l0n3w0lf2010 just add and send me a message letting me know what its about. Thanks in advance! :)

Comment #28 by xXRenegade12Xx
Wednesday, April 10, 2013 @ 05:10:20 PM

if anyone still needs this ill help out message me
GT- KSI xRenegade12

Comment #29 by AvO Elite
Saturday, April 27, 2013 @ 05:41:09 PM

gt AvO Elite need this one msg me

Comment #30 by Da Is1and 904
Wednesday, May 15, 2013 @ 06:44:49 PM

Anyone still playing this game? just borrowed it for a friend and will be playing for a while if anyone wants to play. GT: Da Is1and 904

Comment #31 by TheyAllFloooat
Thursday, June 27, 2013 @ 09:49:08 PM

I just completed the game but I can jump into someone else's so we can both get this. GT: TheyAllFloooat

Comment #32 by ac212ac
Friday, October 11, 2013 @ 06:58:14 AM

I am looking for someone to help me get this done. GT: Frostied212

Comment #33 by Spiderrichard
Thursday, October 17, 2013 @ 06:29:06 PM

Super easy just set up a second gamer profile and just before a boss battle save, exit then load split screen with second controller.

Comment #34 by The blackmarvel
Tuesday, April 22, 2014 @ 10:12:39 PM

Looking to get this cheevo, I'm online right now if anyone could help me out, I'm at krons kanyon bout to face jron, my gt is the blackmarvel

Comment #35 by Joshywa7
Wednesday, April 30, 2014 @ 07:37:15 AM

I am looking for help with this achievement, along with the other co-op achievements. Send me a message (preferably via text, not voice) and friend request explaining why. Thanks GT: Joshywa7

Comment #36 by Gindook
Sunday, January 17, 2016 @ 07:50:12 PM

Looking for someone to do online achievements with. GT: gindook

Comment #37 by eldylto1612
Tuesday, June 07, 2016 @ 04:59:09 AM

Long shot, but I'm up to the part to take on Sledge, so this could be a good opportunity to get this. I am only a level 16 (I know, where have I been?) but in the process on doing more missions to level up.

If anyone can help me, gamertag is ElDylto1612

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Game Info
Gearbox Software
2K Games


US October 20, 2009
Europe October 23, 2009

Backward compatible on Xbox One: Yes
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User Score is based on 4790 user ratings.