Condemned 2 - Bloodshot

In the MP mode "Bum Rush", you have to be in SCU side and survive until the time is over. Do it 5 times.

Easy to achieve with one friend playing Deviant. Create a new game, set the time limit to the minimum and the rounds to 5.

To obtain this achievement, you have to survive to the end of 5 Bum Rush rounds as the SCU agent.

You will have limited ammo as an SCU agent. Try to save ammunition for when you are being rushed at by 2 to 3 bums, or when someone is standing still far away and it's an easy shot. If you run at someone and then attack, you will swing your rifle / shotgun as a melee weapon instead of shooting. You also automatically have a holster and can swap between a good melee weapon or your firearm at will.

If you are on a map where you can reach the Molitovs, it is a good idea to grab them and throw them away as quickly as possible. They are the strongest weapon of the Influenced.

This solution is for Bum King, but it also works for Survivor King, so you can knock both out at the same time. Since the online multiplayer is so dead, boosting this would be easier.

Set up a Bum Rush game as a Ranked match. Play with 4 players, and no one can quit until the end of the match. Any map will do, but Lodge is a nice, small map. Lodge has Broadswords on the wall which can kill an Influenced with one slice.

Each player must win 5 rounds as the SCU. All you need to do is survive the 3 minute round without firing. The key to the achievement is not firing. The SCU player does not need to have the most points in a round, just survive.

Since the Influenced with the most damage becomes the next SCU, choose who will go next and have that person deal one hit to the current SCU.

The achievement will pop after your 5th round as the SCU, not at the end of the match.

The other solutions are "mostly" right.

1. It needs to be done in multiplayer.
2. If trying to pair it with Bum King, four players are needed and it has to be a ranked match.
3. If not being done with Bum King, it can be achieved with only one other person in a player match. That is where I got mine.

Most important that the other solutions don't cover...The SCU must also win the match by points. If the SCU player only lets an Influenced hit them to determine who the next SCU is but does nothing else, the SCU player will "survive" the match towards Bum King (as long as a firearm is not used). However if the SCU player does not kill any Influenced, the SCU will technically "lose" the match due to points. The SCU player must not only survive but also have the most points to "win".

This was discovered over two boosting sessions. In the first session I boosted the SCU player got hit only to determine the next SCU. We all earned Bum King but not Survivor King. When I was in the next session, I was with people who had never played multiplayer at all. I suggested they also used their SCU round towards the 1000 kills (using weapons other than firearms) since all the Influenced are one hit kills. All of them popped Survivor King and Bum King simultaneously. When I added kills to my own SCU rounds, I had the achievement in no time.

It's a subtle difference but just enough to make you think the achievement is glitched if you just follow the other guides.