Here is the full list of all 46 System Shock achievements.
Collect all other Achievements
Complete the game
Complete the game on the highest difficulties
Defeat SHODAN
Start the Reactor Self-Destruct Countdown
Destroy the Cyber Core in each Cyberspace level
Use the Isolinear Chipset
Defeat all of the Cortex Reavers on Citadel Station
Destroy all of SHODAN’s cameras and CPU Nodes
Find the final version of all Hardware Attachments
Find all Audio Logs and Data Sticks on Citadel Station
Discover all firearms
Kill Edward Diego with the Laser Rapier
Find the hidden Audio Log
Find Skully, the Nightdive skull, on every level
Kill Edward Diego
Defeat Edward Diego while en route to the Life Pods
Defeat Edward Diego
Destroy the Antenna Relays on the Systems Engineering level
Find and install every Weapon Modkit
Kill an enemy by bouncing a shot from the Ion Rifle
Replace the Interface Demodulator and fix Subsystem Relay 428
Kill two or more enemies with a single Railgun Projectile
Solve the Chess Puzzle in Delta Grove
Kill two or more enemies with a single Plasma Core
Jettison Beta Grove on the Executive level
Use every type of Dermal Patch
Buy a Grenade from a Vending Machine
Salvage 100 Junk Items at Salvage Stations
Kill an enemy with an Overhead Monitor
Kill 10 enemies while under the effects of the Berserk Combat Booster
Hack 20 enemies which have been acquired by the Target ID Hardware
Kill three or more enemies with a single explosive weapon
Discover a Hidden Door
Buy 10 Ammo Items from Ammo Depots
Destroy the Mining Laser
Disable the Safety Override for the Mining Laser
Solve 15 Circuit or Wire Panels without using a Logic Probe
Jump across the big ramp in the Storage level
Recharge 20 times at a Power Station
Deploy Isotope X-22 and enable the Radiation Shields
Acquire a Laser Rapier
Consume 30 Food and Drink items
Destroy the Medical CPU Nodes
Find the hidden Wrench. This looks familiar…
Exit the Medical Healing Suites