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