Gears of War

This description is worded in a slightly confusing manner. What it means is that you must shut out the opposing team in 10 matches total (Example: Win a 5-round game 5-0). As draws are not scored, they do not matter. As long as you do not lose a round, it'll count. These do not have to be done in a row. The easiest way to get this is simply win 10 1-round games.

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Edit: Cleaned up solution with "fancy" formatting that I didn't really know how to use when I originally posted this solution

This is a good way to get multiple achievements in one session.
This method will get 6-8 people the following achievements:

"Around the World"(ATW)

Don't Hate the Player"(DHTP)

"Mix it Up"(MIU)

"Can't Touch Me"(CTM)


way back when I got these achievements this is how the leader of the session had us go and I'm surprised this wasn't out here before so here is what I think is the best way to knock out multiple achievements in as short of time as possible.

(IMPORTANT!!! have the same people on the same teams though out the session i.e. if you were on COG for the first match stay on COG for the whole time and vise versa. This way everyone on COG will get "CTM" at the same time they get "ATW" then start over and let the Locust team do the same thing)
(Also note that if anyone needs "DHTP" that you can easily get this if you are on the team that is supposed to win, make sure to get all the kills for one match, then trade off next match until everyone has "DHTP")

1st run-though: "COG" run-though
Have someone start hosting 1 round games. I will go in alphabetical order of maps and game types but you can do them in any order as long as you catch them all. First start an Assassination match on Canals, meet in the middle and have 1 member of the COG team get all the kills to win the match (this person will get "DHTP"). Start the next match as Execution on Clocktower and have the COG team win again (switch who is killing if everyone needs "DHTP"). Start the Third match as a Warzone match on Escalation. (Everyone on COG team should get "MIU" at this point). Continue with whatever gametype you want (Assassination might be slightly quicker) for the matches on the remaining maps (Fuel Depot, Gridlock, Mansion, Mausoleum, Rooftops, Tyro Station, War Machine) at the end of the War Machine match everyone on Cog should get "ATW" and "CTM"

2nd run-though: "Locust" run-though
(make sure you keep the same teams)
This should go exactly the same as the COG run-though but for the Locust team.

Summary:
everyone can get "Around the World"(ATW), Don't Hate the Player"(DHTP), "Mix it Up"(MIU), and "Can't Touch Me"(CTM) in (20) 1 round matches.

The full list of Maps and game types (if you want to make a checklist):

Maps:
Canals
Clocktower
Escalation
Fuel Depot
Gridlock
Mansion
Mausoleum
Rooftops
Tyro Station
War Machine

Game Types:
Assassination
Execution
Warzone

There seems to be a lot of confusion with this achievment first it dosent have to be in a row second host matches 1 round long and simply win.I would reccomend gridlock though because of the boomshot and sniper. People always charge at the long shot so just run by the grenades and come up behind for an easy kill. You could also get the boom plus you could always go up to one of the bases at either side of the map. If you remain confused or don't have a clue what im talking about simply leave a comment.

Fastest Possible Way - Need 5 friends

Setup
Ranked Match
1 Round Match
Garden Map
Warmachine

All COG's run into the mist in the greenhouse and die
(this counts as one win for all Locust team members towards the total of 10)

Repeat ten times and achievement pops up

If all six of you need the achievement just alternate between all the COGS and all the Locusts running into the greenhouse mist each (one round) match

15 minutes max to achieve if not alternating
30 minutes max to achieve if you are alternating

Note: this also counts towards your total of hosting 50 ranked matches achievement if you are the host

When you are looking for matches, look for matches that only consist of 1 round. That way it goes by faster. Also you could try and find a 10 round game and hope for the best.