O/S Upgrades are character buffs in System Shock 2.
In-Game[]
O/S Upgrades give the player special bonuses and abilities which are unattainable otherwise. They are only granted by the O/S Upgrade Machines, which are very rare, with only four of them throughout the whole game. Only one upgrade per Machine is possible. Installed O/S Upgrades are permanent, thus cannot be undone.
Many of the upgrades have been rebalanced in the 25th Anniversary Remaster.
List of O/S Upgrades[]
Cyber-Assimilation- Allows to always find a Diagnostic/Repair Module in wreckages of big (Maintenance, Security and Assault) Robots. The item heals 15 Hit Points when used.
Cybernetically Enhanced- Allows to use two Implants at once, unlocking the second Implant slot.
Lethal Weapon- Increases melee damage by 35%.
- Naturally Able
- Grants one-time bonus of 8 Cybernetic Modules (20 in the 25th Anniversary Remaster).
- Pack-Rat
- Grants access to an extra column of inventory slots.
- Pharmo-Friendly
- Offers an extra 20% benefit from almost all Hypos (save Anti-Toxin) and the Annelid Psi Organ.
- Power Psi
- Psionic Burnout (result of unsuccessful Overload of Psi Powers) no longer damages the player.
- Replicator Expert
- Reduces cost of Replicator items by 20%.
- Security Expert
- +2 to Hacking skill when hacking Security Computers. Additionally, in the 25th Anniversary Remaster, invisibility to robots while security is hacked.
- Sharpshooter
- Increases ranged weapon damage by 35%, contrary to what the game's tooltip description says.
- Smasher
- Allows an attack with a charged (held and released) overhand smash using melee weapons for bonus damage. The difference is especially perceptible in the case of Crystal Shard.
- Spatially Aware
- Causes the Automap to be automatically filled in aboard the Von Braun. In the 25th Anniversary Remaster this also marks all enemies on the map. This upgrade does not function in one section of the Operations Deck or any level with no automap, and the map of the UNN Rickenbacker is not automatically filled.
- Speedy
- Increases movement speed by 15%.
- Strong Metabolism
- Reduces the damage from Radiation and Toxins by 25%. In the 25th Anniversary Remaster, also removes the penalty from drinking alcohol and smoking cigarettes.
- Tank
- Increases maximum Health Points by 5 (10 in the 25th Anniversary Remaster).
- Tinker
- Reduces Nanite cost of using the Modify skill by 50%.
| System Shock 2 Character Build | ||
|---|---|---|
| Classes | Marine • Navy Sailor • OSA Agent | |
| Statistics | Strength • Endurance • Psionic Ability • Agility • Cybernetic Affinity | |
| Technical Skills | Hacking • Repair • Modify • Maintenance • Research | |
| Weapon Skills | Standard Weapons • Energy Weapons • Heavy Weapons • Exotic Weapons | |
| O/S Upgrades | Cyber-Assimilation • Cybernetically Enhanced • Lethal Weapon • Naturally Able • Pack-Rat • Pharmo-Friendly •Power Psi • Replicator Expert • Security Expert • Sharpshooter • Smasher • Spatially Aware • Speedy • Strong Metabolism • Tank • Tinker | |