This achievement is rather straightforward. Once you gain access to the Ripperdocs, just go visit them and buy one implant for each part of the body (eyes, arms, legs, immunity system and so on). Some enemies drop implant as well, so you may not need to buy them, but you still need to go to the Ripperdocs to install them.
Remember to change your internal RAM as well, it counts as part of your body. Not all Ripperdocs have an implant for each part of the body, so you may need to visit more than one. For example, Viktor doesn't have legs implant, while Cassius has.
Implants cost, especially the higher version of them, so be ready to have some money to spend. As an indicator, Cassius legs implants costs 45k each, so be ready. Also, some implants may be locked under specific traits such as intellingence 12, body 10 and so on. They could also be locked under Street levels (the arms one need 20 Street Cred), so you may need to come back later when you can fulfill all the requirements, or go to another Ripperdoc.