Gotham City Impostors

You can't really write a guide for an achievement like this, so I'm just going to give some general tips here.

(1) Get prepared:
> First of all pick a weapons-lay-out that you like. I suggest you don't go for this achievement unless you've unlocked 4 or 5 weapons, got comfortable with them and selected 2 you think are up for the job. I used the dawn patrol (good for medium to long range) in combination with a shotgun (should I get caught close range).
> The same goes for gadgets and support items. I used the glider to get around the map quickly (hit-and-run tactics) and the jack-in-the-box explosive to set up traps on choke-points.
> Again the same for body-type. I used the heavy one (mighty I think it's called) because of the extra health and endurance. But again this is personal preference and playstyle.
> And lastly choose fun facts and a rampage that you think might aid you. I gravitated towards the ones that boosted defense rather than offence (for example give me more health rather than make my knife-attack more powerful), but again this depends on you playstyle and preferences.

(2) gamemode
There are two valuable options for this in my opinion.
> Psych war: Pretty much a team deathmatch but activating the propaganda machine leaves your enemies vulnerable for a few seconds, potentially giving you a couple of free kills. There's one major downside to this gamemode however. Halfway through you'll switch sides and kills DO NOT carry over. So should you have a 7-killstreak at the moment the switch is made, you lose all those kills and will have to start the streak all over again.
> Fumigation: the gascanisters here can provide great chokepoints and enemies tend to swarm around them. Set up an ambush using some beartraps or jack-in-the-box-explosives and with a little luck you can get a couple of kills easily. The downside to this gamemode is that there are hardly any 'safe' areas for you to heal or replenish ammo. Enemies tend to be all around the map trying to get to objectives or healthstations, so you'll have to be on the top of your wits at all times.

(3) Some general tips
> Try and get familiar with the maps first before attempting this. Know where the chokepoints are where enemies will likely be so you can set up a good vantage point near one of the points for kills, but also so you can avoid these areas when your health is low and you need to find a safe spot to heal up.
> Always keep track of your health! This is hugely important because even with a heavy bodytype and good defense, there's still weapons that can take you out in a couple of hits.
> Try and pick enemies of one by one as much as possible. Taking on groups of 3 or more is usually a bad idea.
> Use your gadgets! Put a jack-in-the-box-explosive near a gascanister in Fumigation for instance. It's usually a free kill! Or disorient enemies with your boomerang or something. The right gadgets can easily turn the tide in a fight.
> Above all don't get mad or frustrated. It's not going to help. I had plenty of 7 or 8 killsstreaks before I finally nailed the 10 killsstreak I needed. Perseverance, my son!

Good luck!

On The 25th floor. grab the battery in psych warfare and then camp the tower on the left or right side of the building. throw a care package to help you with health or an airspace denier and knife them for an easy kill. also you should be a mighty with horse healthy and marksman. As for the Rampage, choose the armor defense one.

I got this last night. Mode was Team Deathmatch. The setup I used was Gatekeeper with BO sniffer mod, Hauntsman with Armor Pen rounds, Care Package, and Ninja Smoke Bombs.

First tip, if you don't do this already. If you run out of a bullets in your gun immediately switch to your back up weapon and begin firing. I've notice when I'm fighting people online after they empty their clip I just see them reloading the same weapon. which gives me an easy kill because I switch to my back up weapon.

Basically I stayed invisible almost the entire match with Ninja Smoke bombs. It's important that you always run by a wall. If you run in the middle of the battlefield you're bound to get in the middle of crossfire. Using the BO sniffer on the Gatekeeper I find an enemy I would get behind him uncloak and kill and cloak again. If I took any damage from the person I killed. I would find a corner where there was no activity going on. Pop out a care package and cloak So I would be getting my health back while invisible and at the same time I didn't have to go any health stations where anyone else would be (where you could get hit or even killed by stray bullets.) Below is the link of the match on Gotham City impostors site where I got the achievement.

You can filter the match to just me and you can see how almost all of my kills were me chilling next to a wall and waiting for the right moment to attack.
http://www.gothamcityimpostors.com/match/xbox/view/721373172...

I recommend Fumagation for this achievement as you will gain significant positional information over the enemy whenever they attempt to steal a gasblasters. And for those having trouble with this achievement I recommend the following build.

Body Type: Mighty

Weapons:
Jackhammer: Muzzle Break
Bear Stalker: Body Oder Sniffer

Gadgets:
Glider Rig
Pipe Bomb or Body Armor

Fun Facts:
Horse Healthy
Hard Target

Rampage:
Tough as Nails


I personally like this build quite a bit, though it's very much personal prefrence. My goal was to build a very tough character, who can deal out alot of damage from a safe place. So once the game starts, glide up to a vantage point and pull out the Bear Stalker. Use this to get as many safe long range kills as possible, before the enemy becomes aware of your presense and starts activly hunting you. If you should get badly injured, (Don't worry, you can never be one hit killed at full health by a sniper thanks to Hard Target) fly away, seek an aid station, and find a new place to camp for a few kills. Rinse and repeat.

If things start to go to Hell, pull out the Jackhammer and let rip. With a muzzle break it does a little less damage,but it's much more stable so Headshots are suprisingly easy, and deadly. Finally, after the first five or so kills you should earn your selected rampage. My favorite, Tough as Nails cuts all damage by 75% for 15 seconds making your Mighty character nigh invincible. This is your lifeline, save it for an emergency, but once activated, abuse the limited window of oppertunity, if you use it at full health, you essentially jump from 322 health to 1288; so go crazy.

Additionally, the pipe bomb is a great way to soften up, if not outright kill players attempting to steal a gasblaster. I caution away from such risky behavior if you're above 5+ kills; at that point it's better to play it safe, UNLESS you're rampaging of course. Also as a little bonus Dive Bombing is very effective as a Mighty, dealing 140 damage killing lesser characters before they could even see you, and if you can get a teammate using a motivator to follow you around; even better.

All I can say though is: perservere, this is a tricky achievement for many people but eventually you'll get that game where everything goes right, and if you plan on getting every other achievement in this game, this one will come by itself over time.

There is a really easy way to get this achievement, but you need two people for this. Just start an ingame party in G.C.I with a friend and commence playing. Eventually, you will play a round where you will not be on the same team. When this happens, both choose the ninja bombs that'll make you invisible (and also the 'wallflower' thingy that'll make you invisible to taggers and sniffers) and arrange to meet each other in a secluded area of the map where you can kill your buddy ten times in a row. Ka-CHING. Unlocked. Just make sure to be a pal and let him kill you ten times afterwards before the match is over.

To unlock this achievement you need to kill 10 enemies without dying and consequently earn a 10-kill streak. How to do it? Just use a setup that favors YOUR play-style. Just pay attention in the game because every sound or shadow matters. As you can see in the video i like to rush and kill people but when i need to stop, i camp and wait... Don't forget to try and heal yourself in order to stay alive longer...

The way I did this was set up a tank character with extra damage on the falcon blade and invisible, then just stalk around doing laps of the map picking off the peopleon the outside