Gears of War 2

Reaching and surviving wave 40 on this map can be difficult. The way that I did it is to first get a group of guys that will join you and stick around with you in a PRIVATE Horde match. This is the best way to finish ANY horde; because you can set the difficulty to CASUAL. Other advantages are that you can also set the starting wave to the last completed wave you did if you didn't make it to 40 on the first attempt.

The enemies can spawn by the monument (Hammer/Mortar), both side wings of the main courtyard, the raised rear platform with the Sniper/Torque, and in the abbey (Flame/Boom). This all complicates things because they spawn in a flanking position if you just hole up by the main stairs. The most difficult waves are going to be ~36 and up.

My best advice is that on those waves you start to gather and place shields in ONE of the lower rooms (Boltok/Gorgon). You have an ammo box spawn, 2 main points of defense at each door, and one rarely exploited window to defend. With 4-5 friends split into 2 groups with some shield choke points this is the best place to make you stand through the final waves. You are close to the good weapons for easy resupply at the end/beginning of the waves. In wave 40 I placed a shield next to the sand bags while 2 others players held the rear. I also had a shield in my hand with the gorgon w/ zoom for easy head shots and tons of damage with the good cover for defense. We beat 40 on the first try this way, with multiple fails using other methods.

To Reach lvl 40 the best game types to play for exp are (% contributed by iiM SO N1NJA, thx)==
Wingman- 109%
Warzone- 100%
Execution- 98%
Guardian ~ 83%

Hope this helps, and good luck.

Here is a way to get this achievement when you are playing with only two people: just stay on the upper side of the level and after the Maulers come plant the shields on the ground by the 2 stairs up front blocking the way for enemies. Only Sire's will knock them down and a Bloodmouth climbs over it sometime.

When there is only one or two enemies left (prefered to be a Mauler due to their relatively slow walking or knee-capped drone) go for the big ammo-box that is in the front of the map.

When I was playing this with a mate we went down on Wave 30 wich is a disaster to recover from. Eventually we managed to get it on the sides of the map with the entrance blocked with some shields taken from Maulers. When we ran out of ammo we used the guns from the drones that sit on top of the Bloodmounts.

If you want your old guns back and you couldn't pick them back up in time just die in the earlier waves (1-3) because it's not that hard to recover in the early waves.

Have a good hunting ;)

If you have a full party aka 5 people in total, then this won't be a difficult achievement. Set up a Private Xbox Live Match and set Horde difficulty to Casual. Learn where the weapons are. Especially the mortar/hammer of dawn can be important to know.

Just play until things are getting a bit annoying. In my case this was around wave 35. We decided to camp at one of the small rooms where the Locust spawn. These rooms are at the sides of the courtyard with the mortar. It doesn't matter which one you choose. This is an easy to defend spot because you have two places you can use as cover and the enemy can only come from the front and from the side. The front is more exploited than the side. So this spot is by far the best place to defend. Also, because 5 people can focus on one enemy. As in the above guide, you cannot. You can also place shields in front of the entrance but you need three shield to completely shut off the entrance. This can be hard to set up but it isn't necessary to do.

As with the other horde achievements, you don't need to do this in one go, ie. you can some waves on one session, and the other waves on another session, or however you want. However, tracking which waves you've done can be a pain (the in-game tracking system tells you how many you've done, but not which ones), so I made a printable checklist for all the achievements in pdf format.

Enjoy: http://www.mediafire.com/?u8nz9f8ia7ujbd1

Once you’ve managed to get to level 40 (you can still play this before you hit level 40 but the achievement won’t unlock until you hit this level), you’ll need to complete waves 1-40 on the map Memorial. This map is very kind on cover positions and there is an abundance of decent places to defend. The easiest place to defend is right at the very back of the map and upstairs. You’ll have the pleasure of having a Torque Bow or a Longshot spawning next to you or if you run down the stairs you’ll find a Scorcher or a Boomshot. These can provide extremely useful, so use them. If you set up your Boomshields on either sets of stairs to the left and right of you, it should be a piece of cake.

Good luck!