Here is the full list of all 35 1st Core: The Zombie Killing Cyborg achievements.
Complete the Game on Medium.
Complete the Game on Easy.
"Kill it with Fire" on stage 2
Complete the Game on Hard.
Complete the Game Using only the Pipe as Weapon.
Recycle Something Wrong
Complete First Area, without killing anybody.
Complete the Game as God.
Something you don't have to do in The Options Scene.
Kill a Spider 'the right way' on Stage 1.
Buy All the Cyborgs.
Get +5 in Str, Dex, Speed & Per.
Level 10 Minigun
Level 10 Uzi
Level 10 Revolver
Start The Game on God Mode.
Use the Cheat Code....
Sound of Silence.
Collect 100 KG of Garbage on 1 stage.
Started the Game more than 5 times.
Destroy Both types of Hive.
Discover +75% of any map.
Some Action you can do from Stage 2+.
Kill 100 on a Single Stage.
Take 5 ScreenShots
Take a ScreenShot with F12
Going back from The MissionMap Scene
Start The Game on Medium.
The Right Day to Start a New game.
Something to read in The Awards Scene.
Start the game on Hard Mode.
First time you make a HeadShoot.
Get all 5 types of Weapons.
Driving over a bug to kill it.
Start The Game on Easy.