Monday Night Combat

Can also be done in a Crossfire private match where you can start the game 1 on 1. When going for this achievement you might want to get the "10 grapple kills achievement" also out of the way. On another note if you win this match you will also get the "mvp achievement".

Thanks to K4rn4ge for finding out that you can start a private Crossfire match 1 on 1

The following video is a guide I made to knock out 6 achievements in less than 10 min in a private crossfire match, including the "Sacker" achievement.

One problem you may find even in a private match is having enough time to get the required kills before the other bots destroy one of the money balls. Using this guide, you will have plenty of time.

Here is a step-by-step written guide of what I did in the video:

- Go into Crossfire lobby and hit X button to make match private, then hit Y button on a second controller to join and sign in guest account. Start match and select the Tank for your main profile and the Assassin for the guest account.

- Move the Tank over towards the other side and use the hover jump to get on the platform right outside the other players base. With other controller, move Assassin out towards the Tank.

- Switch to the Tanks secondary weapon (LB) and shoot the Assassin twice so she barely has any life left (RT). Go up to her and use the grapple (LT) to finish her off. Do this 10 times to get the "Grappler" achievement. You will also get the "Hot Streak" achievement after 3 kills.

- If you knock the Assassin off the platform to kill her without shooting her first you will get the "Outta My House!" achievement.

- Put the Assassin in the upgrade menu (up on Dpad), and kill her to get the "Caught 'em Nappin" achievement. (Had slight issues doing this the first time in the video)

- Kill her a few more times for a total of 15 to get the "Sacker" achievement.

- Drop down and finish off the money ball to win the match and get "MVP" achievement.

This can also be done in a "Private" multiplayer game. All that is required is 2 controllers 1 player on each team. The account you want the Achievement on should be the one killing the afk controller.

easily done with sniper class upgrade traps first because that will save your butt from assassins. And then upgrade the snpier skill(grey) and place traps in front and behind you and just keep sniping try for headshots. easily done early on in match bots to not count towards this

This is the same as most of the online achievements for this game...

All you need to easily get most of them is a second controller, if you plug it in you can guest it the same as in Halo 3 and just play against yourself in a private match to get the achievements.