Halo: The Master Chief Collection

Halo: The Master Chief Collection Achievements


Halo 3: Complete all Halo 3 Legendary campaign missions in under 3 hours.   

As one of the four Legendary speed running achievements, this achievement will prove to be one of the most difficult tasks within the entire collection. It's worth noting that you may want to grab two or three Co-Op partners when working on this achievement for two reasons. One, the extra firepower will help put down enemy forces a little quicker. Secondly, one or two players can usually act as a decent distraction while the remaining two players attempt to push on and run by as many enemies as possible in an attempt to grab the next checkpoint.

This essentially means that you may want to replay individual missions dozens of times in order to perfect your runs and learn new tactics in skipping various firefights. Unfortunately, a text-based guide would be too tedious in explaining every single mission within the game, so please refer to THIS LINK for an in-depth look at completing Halo 3's Legendary Campaign in under three hours. A huge thanks goes out to Naked Eli for providing the video content.

As confirmed by Sun100, this achievement does not need to be attempted in one continuous run. Rather, the game will track your best time on each mission completed on the Legendary difficulty setting and add them up for a grand total. When a new "Personal Record" is set for that mission, it will override the previous tracked time. This essentially means that you can tackle a mission multiple times in an attempt to perfect your speed run.

NOTE: By following the speed running tactics provided in the video above, you will almost certainly obtain the Par Time achievement for each of the Campaign's nine missions. This means that if you have yet to grab the Par Time achievements on the Easy or Normal difficulty setting, they can be stacked on the Legendary difficulty setting while working on this achievement.

Rate this achievementAverage Rating (Based on 2 votes)
User Comments
Comment #1 by Frijoler0
Tuesday, November 11, 2014 @ 03:08:13 PM

Gamertag: Frijoler0

Also willing to create a good group to do the multiplayer achievements, and these Speedrun (legendary is already difficult.. so as many people as we can get will be nice),

Add me, invite me to your party and lets play

Comment #2 by eduardo99
Saturday, November 22, 2014 @ 03:24:28 PM

GT: Head Harbinger
I still don't have these achievements. Also willing to boost multiplayer achievements.

Comment #3 by BulletLukey
Thursday, November 27, 2014 @ 09:26:00 AM

You don't have to complete all the missions in a single run through!

Comment #4 by Snipes Remix
Sunday, November 30, 2014 @ 12:43:44 AM

Gt same as user name. Looking for people to do this as well as H2 H3 and H4. And LASO, you must know some speed running tactics. Send Message letting me know who you are.

Comment #5 by RecklessCorgi
Thursday, January 01, 2015 @ 11:09:14 PM

If someone wants to do this let me know, I feel it should be very easy with 4 player co-op, I've watched the world record speed run of halo 3 and there aren't too many hard skips and it has a lot of extra time to be under 3 hours. I've also already gotten the speed run for halo 4 legendary achievement.

Comment #6 by bryeck16
Sunday, January 04, 2015 @ 12:16:49 AM

Other than Tsavo Highway the missions arent too bad to go through quickly

Comment #7 by whitewolf144
Sunday, January 25, 2015 @ 11:39:22 AM

I've completed all the missions on legendary in under 3 hours and no achievement!!! Anyone else had this problem?

Comment #8 by yeskezspamen
Monday, February 02, 2015 @ 11:19:06 PM

Any one want to 4 man the Halo 3 and Halo 4 speed runs?

Comment #9 by curtped
Thursday, February 05, 2015 @ 08:41:10 AM

I'll do the Halo 3 speed run in 4 player co-op

Comment #10 by Distractor08
Wednesday, February 11, 2015 @ 05:12:17 PM

I am looking for a good group of 4 to do this and all the other speed runs. Hit me up if interested. GT: Distractor08

Comment #11 by Skifer
Wednesday, February 25, 2015 @ 10:38:55 PM

looking for getting this achievement done.
GT- OCD Skifer

Comment #12 by zCloud
Saturday, March 07, 2015 @ 11:30:08 PM

Looking to do this

Comment #13 by Stingrea
Friday, March 20, 2015 @ 06:28:11 PM

Need Help with Halo 1-4 Legendary 3hr achievements, Hit me up if you could help us

GT: Stingrea

Comment #14 by Wheelock
Sunday, April 05, 2015 @ 11:27:21 PM

I would like a speed running partner for any of the campaigns.

GT: Classy Moth

Comment #15 by SilzzlinBac0n69
Saturday, April 18, 2015 @ 04:05:38 PM

Looking to start a group of 4 or join an existing group. I will be available for this achievement until i post here otherwise. GT: SilzzlinBac0n69

Comment #16 by HaloCompletionist
Monday, April 20, 2015 @ 01:12:38 AM


Comment #17 by verysneekyy
Tuesday, April 28, 2015 @ 11:45:04 PM

looking for 2 decent people at the game to run through this message me gt- very sneeky

Comment #18 by gbanester
Monday, May 04, 2015 @ 09:01:28 AM

looking to do this and all other campaigns


Comment #19 by shutup8777
Monday, May 25, 2015 @ 04:13:24 PM

I need this 1. I need 2 ppl to make a full group msg if u can and we will set gt shutup8777

Comment #20 by Rejected Carnie
Tuesday, May 26, 2015 @ 06:24:28 PM

Looking for people to do all the speed runs with. Send me a message.

GT= Rejected Carnie

Comment #21 by x Beliefs
Tuesday, June 30, 2015 @ 12:14:04 AM

Need people for this.
GT:x Beliefs

Comment #22 by jmusilli
Tuesday, August 04, 2015 @ 03:16:44 AM

If anyone is rather experienced with the speedrunning techniques and tricks with Halo 3, and would be willing to help me out with getting this achievement, it would be greatly appreciated. Thanks!

Gamertag:A Its Johnny

Comment #23 by Tacoxcity
Sunday, August 09, 2015 @ 12:14:18 AM

Want three people to do it
GT: HappyTac0s

Comment #24 by AsSelf
Thursday, August 20, 2015 @ 01:13:06 PM

Easy going, team player with over 87,000 gamerscore.

Add me for co-op and achievements.

GT: your7sins

Comment #25 by pbonk44
Monday, August 31, 2015 @ 04:48:26 AM

Whenever I save and quit, it keeps the time that I hit save n quit instead of the checkpoint time.

Comment #26 by Brendo123
Monday, August 31, 2015 @ 11:40:46 PM

need to do this same as username Brendo123. Im a great legendary player just hard doing it alone

Comment #27 by pbonk44
Tuesday, September 01, 2015 @ 04:34:16 AM

Looking to boost, gunna probably need 4 people

GT: Attestedbarley2


Comment #28 by CrimsonEd
Friday, September 25, 2015 @ 12:01:31 AM

If it's not too late, I'm down to help people with this one, as I myself need it still.

GT: CrimsonEd117

Comment #29 by Brendo123
Wednesday, September 30, 2015 @ 10:13:55 PM

I need help with this and other 3 hour achivements gamertag is same as this


Comment #30 by sin 1
Thursday, June 02, 2016 @ 09:06:04 AM

I'm an easy going, team player that gets along with almost everyone.
Feel free to add me for co-op game-play and help with achievements.

GT: sin 1

Comment #31 by LegendaryGoetz
Sunday, July 10, 2016 @ 11:42:30 PM

Looking to speedrun this achievement and many other halo MCC achievements. Message my gamertag: LegendaryGoetz

Comment #32 by aBeardedWolfman
Thursday, June 15, 2017 @ 03:48:51 AM

Looking for someone to help a moderately average player with all LASO's (preferably the legit way) and all legendary speedruns. GT: aBeardedWolfman

Comment #33 by fisher2000
Tuesday, September 05, 2017 @ 05:07:39 PM

All I'm going to say is that I could not have done this without using this:

Comment #34 by fisher2000
Tuesday, September 05, 2017 @ 05:08:49 PM

I ment this

Comment #35 by bobbythefish123
Saturday, January 19, 2019 @ 06:12:00 AM

All my solo times add to less than 3 hours, and with co-op thrown in it gets even less. Is there anything I can try to get this to unlock?

Comment #36 by sin 1
Thursday, June 11, 2020 @ 05:24:55 PM

I'm an easy going, team player that gets along with almost everyone.
Feel free to add me for co-op game-play and help with achievements.

Gamer Tag: GDMF

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Game Info
343 Industries


US November 11, 2014

HDD Space Required : 45.63 GB
Price: $59.99USD
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User Score is based on 363 user ratings.