Halo Wars 2 achievements
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Halo Wars 2

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There are 126 Halo Wars 2 achievements (57 without DLC) worth 4,824 (1,750)

51,790 tracked gamers have this game, 701 have completed it (1.35%)

1,320
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4.1 from 44 votes

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There are 37 achievements worth 1,320 (410)

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Achievement Details

Walled In in Halo Wars 2

Walled In17 (5)

Have a wall built on every plot of the map at the same time (Terminus Firefight)

  • Unlocked by 1,453 tracked gamers (24% - TA Ratio = 3.48) 6,024  

Achievement Guide for Walled In

AuthorSolution
Jellyfissh
104,628 (51,640)
Jellyfissh
Achievement won on 30 Apr 18
TA Score for this game: 4,824
Posted on 30 April 18 at 17:11, Edited on 09 May 18 at 13:22
This solution has 1 positive vote and 0 negative votes. Please log in to vote.
The best way to do this is playing a co-op game of 2 players on easy difficulty. Do not change any additional options in the menu or it won’t work. If you play with 2 other players, this means a 3-player team, the map will be bigger, and you will have to build more walls, also the enemy waves will be bigger.

I think the best way to do this is having one player focusing on creating units (I recommend air units, but other units also work well) and expanding in the map, while the other focus on collecting supplies to build walls (he/she can also help with some units, but don’t create a big army).

When the game begins, stay and protect the starting area (Terminus and main bases). Build walls and turrets and start building a good economy. After wave 6-7 when you and your friend have supplies and an army, go and dominate one of the unexplored sides of the map, building the bases, walls and turrets. Don’t stop training units to defend your bases against enemy waves!

Once you have that zone controlled you can make your way to the other side of the map. Now just use all your supplies to create walls. Once you built a wall in every slot the achievement will pop.

Edit: I can confirm that any type of wall counts for the achievement, as long it's construction is finished.

NOTE: It seems like any type of wall counts for the achievement. When I did it, I used different type of walls, including Banished-UNSC walls, and the achievement popped.
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HolyHalfDead
416,615 (199,605)
HolyHalfDead
Achievement won on 21 May 18
TA Score for this game: 4,824
Posted on 21 May 18 at 15:06, Edited on 25 May 18 at 10:33
This solution has 2 positive votes and 1 negative vote. Please log in to vote.
You can rush this on Easy as The Arbiter. Build one Power Extracter, then just build Harvesters. Split up the Grunts you started with, and go round the map building Unstable Barrels (they cost 100 Supply). If any do get destroyed you will need to rebuild them. Build a couple of Minibases as you go, and more Harvests to speed up the rate you generate Supply. Build a couple of Turrets near the Terminus, as that should be enough to handle the enemy on Easy for at least the first 10 waves. As soon as every plot has a wall on it at the same time, the achievement will unlock.
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