Slow Mo 10
Kill 50 enemies while they are in stasis.
To use stasis, you must hold
. The enemy will go into a slowed state and will be much easier to kill. Stasis does refill over time and as you upgrade your RIG's stasis abilities, will last longer and be able to be used more frequently. You will know the enemy is in stasis because it will be blue. This should be something you use commonly throughout the entire game.
Blast Corps 10
Kill 30 enemies with explosion damage.
There are a few ways to cause explosion damage. An obvious way is to use kinesis to throw a grenade or rocket back at an enemy. Another way is to actually craft a weapon that causes explosive damage, and use that as your gun to gain this achievement. Crafting a weapon is your best option. There are various tips you can use while crafting an item to cause the explosive damage (mines, grenades, etc). Focus on getting this and it will come quickly.
Kill 30 Soldiers with head shots.
The soldiers are the human enemies. You see them early on in the game and eventually more later on. You can get one shot kills by shooting them in the heard, or shoot them in the head a few times to weaken them. As long as the last shot blows their head off, it will count.
Empty Chamber 10
Kill 30 enemies using melee strikes or a melee Weapon Part.
This is very straightforward. You do not have to be out of ammo. This is actually a good way to conserve ammo. Just press
without aiming to do a melee strike. Sometimes you will shoot an enemies legs off and be able to go finish it by stomping it.
Dropping Acid 10
Dissolve 50 enemies with acid.
To do this, you must have the Acid Bath weapon part. This part is found in Chapter 11 in the optional quest "Armory". You must get to the end and open the container with the rewards. Attach this to your weapon at a workbench. When you shoot enemies, they will start burning from acid. You can get this over time throughout your playthrough. If you want to get it all done at once, you can play the Co-Op mission in Chapter 14 while playing as Carver. At the final nightmare you will get to the end where you have to destroy the symbol in front of you. Instead, stay next to it and shoot the frail feeder shadows. Move forward to respawn some. They will sometimes stop running at you when in certain spots around the symbol making it pretty easy to maintain your kills. Just be warned, that in Co-Op play, your stats will often reset if you die or quit out.
Electric Lawnmower 10
Kill 30 enemies using an electrified Ripper blade.
This is something you must craft. You will need a rip core and the electric charge attachment. Make sure to fill all circuits in. Once created, go ahead and start using it to kill enemies.
Overpowered Healing 10
Use quick heal to heal yourself 20 times.
Quick heal is very helpful when you are low on health. Just press
to do a quick heal. Do this, of course, while out of aim mode. It should be the only button you press. You can only heal if you have health missing and you must have health packs in stock of course.