Having the hack tool will make this achievment alot easier. You don't need a hack tool, but it makes it alot easier. When your hacking, a screen will pop up, press the use button when it is in the green or blue areas to progress the hack. If you land in the white blank area, you will take damage. If you land in the red area, security bots will be called to deal with you. You want to land in the green or blue areas.
There are eight machines which need to be hacked:
• Circus of Value
• Door Locks
• El Ammo Bandito
• First Aid stations
• Safes
• Security Bots
• Security Cameras
• Security Turrets