Gears of War

This is most easily achieved in local play using two controllers. As One Eyed Tigh mentioned, Raven Down is the best map to do this on due to its size and the fact that it only has two objectives.

The method I am about to describe only requires you to spend about 20 seconds setting up each round, allowing you to go and do something more exciting for the next four minutes while you wait for the round to finish itself off.

Start a 120 point game, one round. You can actually make the match as many rounds as you like, but I prefered doing one round at a time so that I could stop whenever I wanted to.
(Note: if you are also going for the "THIS! IS! ANNEX!" achievement, then doing this in three round matches will also count towards your match total for that achievement - credit to VegaDark541 for that suggestion).

When the round starts move both players near to the first objective but don't enter the ring yet.
Move Player 1 (the one who you want to get the achievement) into the ring and wait for the countdown to begin.
Once the countdown starts, move Player 2 into the ring and simultaneously move Player 1 out, stopping the countdown. At this point Player 1 will have a small number of points, let's say 2 for the sake of this example (it can be anything between one and four, five or more is too many) and Player 2 will be counting down for the remaining 58 points.
Now move Player 1 to the other end of the map and leave him so that he will be positioned inside the second objective once it appears.

You can now leave the game alone for four minutes while you wait for the round to end. The objectives will alternate ends, awarding points to either player so that the scores after each objective look something like this:

Player 1: 2 Player 2: 58
Player 1: 62 Player 2: 58
Player 1: 62 Player 2: 118
Player 1: 120 Player 2: 118

Each round will take roughly four and a half minutes so this achievement can be done in around 90 minutes, but using this method you will only have to be present for ten minutes of those. Enjoy the other 80: I used mine to eat cake, watch TV and write this guide. I hope it helps!

Here's how I did it:

Using two controllers (with a second profile logged in), I started an Annex match on Raven Down, 3 rounds with 180 points per round. I chose Raven Down because it is a small map with only two objectives.

Once the match started, I used my second profile (logged in as a Locust, though it doesn't matter which side you choose) to capture the nearest point (sometimes it will spawn right next to one). As soon as the countdown from 60 began, I ran the Locust to the next objective and parked him next to it.

I then used my primary profile (the one needing the achievement) to run over and stand next to the objective being counted down. Once the count got under 5, I crossed the barrier and captured the objective for ~5 points.

Since I left the Locust parked next to the other objective, the next countdown began almost immediately. Once again, when the countdown from 60 started, I ran the Locust back to the other objective. This saves some time, as you have to wait for the countdown to end no matter what, so you might as well set up the next capture.

After a couple of rounds, the Locust was at 175 (or so) points. I then moved him safely out of the way and captured points with my primary profile until I reached 180 total points, winning by 5 (or less). Total time for each 3 round session: about 22 minutes, give or take. Repeat 20 times (can be tedious, so I used my MP3 player to help ease the boredom), and achievement unlocked.

Hope this helps. Send me a PM/Message through Live for more information.

EDIT 8/5/19: Please see DragonYen’s comment about making this a little easier with a lower score and less movement. I’d type it out, but it’s pretty involved. Suffice it to say it’s a good addition.

Using the two controller method: i.e. doing it all by yourself.

First let me explain the 2 controller method, as I did not know how to do this when I first started.

Press start.... enter Verses modes enter X-Box Live Player Match (does not need to be ranked) Now press the Y button to sign into a guest account and then host a Private Match.

Set up: ANNEX, rounds 1, score limit 120pt. (NOTE* If you are going to start working on, or have already started working on the achievement THIS IS ANNEX! make your rounds 3 and this will count for that achivement as well.

For this example: I will use the Cogs (i.e.; Marcus, Baird, Cole) as the main account going for the achievement and Locust
(i.e.; RAMM, Bolters, Grenadier)

Take your guest, (the account not needing the achievement, the Locust) and have them win the first capture point. This should put the Locusts at 60pts.

Now comes the part I found most confusing.

Have that same account that just won, (the Locust with the 60pt. lead) and move to the next capture point. Enter and begin to capture it. When the Locust starts gaining points quickly move your other account (the one needing the achievement, The Cogs) to the same capture point that is being scored on. If it's a larger map or you’re unfamiliar with the map wait to begin capturing it until you have both (Locust & Cogs) accounts close to it, so you don't accidently screw it up.

When you are comfortable that you know that you can get both accounts to the second capture point move on to the next step.

Move the Locust out of the circle (capture point) or distance kill it, but do not enter the capture point until the score for the Locust reaches between 116 to 119, otherwise it will stop scoring points. The scoring will continue even if the Locust has been killed or moved out of the circle. So with that in mind, be aware this is a very close margin of error. You must now wait until the timer is down to between 4-3 seconds before entering the Capture circle. (Remember you have to win by less than 5, so you have to be fewer than 4 or less.) The good thing is that the moment you cross into the capture point the scoring immediately stops. BEWARE, ENTERING THE CAPTURE POINT WITH THE ENEMY (LOCUST) STILL IN THE CAPTURE POINT WILL NOT STOP THE SCORING.

Now finish capturing the last point, with the Cog, which should only have 4pts. or less. When that one is captured go find and capture the remaining two points with the Cogs for the win.

Now just repeat this for 20 rounds, not 20 matches.

Hope this helps..

My solution for this achievement is a lot easier :)
get a second controller host a private match on annex, map raven down, 3 rounds 120 points to win , when the game start take first point with your second controller , you will have 60 points (2nd controller) , then capture the next point and move out of the circle with your 2nd controller , now wait till it have 116 points , now break the ring and capture it you will have to capture few more till you have 120 points but your sec controller will have 116, repeat this 20 times and blop ach is yours ;D

For those of you that can't understand what to do in this achievement this is the solution for you.Basically for this achievement you have to win by fewer than 5 points each round/match.You can do this with two controllers!

Just go to local then set the rounds to 1 and score to 120.

When the round starts move the 1st player to the 1st objective(the one who is going for this achievement),once the 1st player has a score of 60 it will move on to the 2nd objective.Let the 2nd player move to the 2nd objective then, when the 2nd player gets 60 then let the 2nd player move back to the 1st objective. Now you have to do the good ol' switchero,let the 2nd player get 116 points,but be sure the 1st player is ready to move back in.As soon as the 2nd player gets a score of 116 just get the 2nd player out of the ring and move the 1st player back in the ring.Now just wait a minute for the first player to win the match.And that's how you win by a fewer points of each match.Now just do that 19 more times and the achievement will pop.I hope this helps you!