System Shock 2 progression choices shape how you handle combat, exploration, equipment, and psionic abilities. Technical skills can affect task difficulty and unlock access to tasks with minimum requirements; they also interact with software. The entries below describe supported effects and constraints, including where two guides emphasize different strengths. They do not provide a universal build: choose according to whether you rely on particular weapons, hacking, energy equipment, or psionics.
For conventional firearms, compare Standard and Energy; for explosive weapons, consider Heavy. Their supported roles and constraints are covered in the combat skill entries.
Standard weapons skill Energy weapons skill Heavy weapons skillMaintenance affects upkeep and maximum equipment charge; Repair and Modify are narrower alternatives with different uses.
Maintenance Repair ModifyHack supports access to security systems and locked containers, while Cyber Affinity changes hacking sequences by eliminating filled nodes.
Cyber Affinity HackChoose a topic to see how it works, where it helps and what to consider.
Strength increases melee damage and inventory space. The Skills & Upgrades guide says each point adds three inventory spaces and notes that Strength also determines whether the character can use the heaviest armor and a couple of the largest weapons.
Understand this choiceEndurance increases hit points and determines resistance to radiation and toxins. This makes it relevant to survivability against both ordinary damage and those environmental or status hazards.
Understand this choiceAgility increases running speed, reduces fall damage, and reduces weapon kickback. The guide describes the speed increase as useful across classes and says kickback reduction matters more for stronger weapons that have stronger kickback.
Understand this choiceCyber Affinity, displayed as Cyber in the MFD, eliminates one filled node per skill level during a Tech Skill hacking sequence. The guide says its effect becomes more helpful later and for characters who hack often.
Understand this choiceHack governs success in hacking keypads and secure crates. GameBanshee says technical skills reduce task difficulty by 10% each but do not reduce ICE Nodes; software governs technical skill levels, with a maximum level of 3 per software category.
Understand this choiceMaintenance governs weapon upkeep and maximum equipment charge. GameBanshee says each level lessens nanite expenditure on maintenance, improves Disposable Maintenance Tool efficiency, and permits an additional 10% energy charge in equipment.
Understand this choiceRepair governs repairing weapons and Replicators. GameBanshee says some Replicators require it to be brought online and that Repair can restore broken weapons to working order, including certain weapons found broken.
Understand this choiceModify governs success in weapon modification. The Skills & Upgrades guide recommends level 1 or 2 to modify the pistol, shotgun, and laser pistol to level 1, then using French Epstein devices to reach level 2.
Understand this choiceStandard is the combat skill for Standard weapons. The Skills & Upgrades guide calls the category useful early and later, and says level 6 enables use of the assault rifle.
Understand this choiceEnergy governs Energy weapons, which the Skills & Upgrades guide describes as most effective against mechs. It singles out the laser pistol as effective against robot-class enemies and moderately effective against most flesh-based creatures.
Understand this choiceHeavy governs Heavy weapons. The Skills & Upgrades guide identifies the grenade launcher as the main reason to invest, describing it as powerful and saying its ammunition is plentiful.
Understand this choiceResearch governs research tasks and can unlock use of certain items. GameBanshee says researching enemy organs often grants a 25% damage bonus against the relevant enemies, and that certain items become available only after research.
Understand this choiceSharpshooter increases damage from each shot with a ranged, non-psionic weapon by 15%. It is an O/S upgrade listed in the Skills & Upgrades source.
Understand this choiceCybernetically Enhanced allows the character to use two implants at once. It is listed among the O/S upgrades in the Skills & Upgrades source.
Understand this choiceRepair can restore broken weapons, but Maintenance supports routine upkeep and increases maximum equipment charge. The guides describe distinct effects.
Some research tasks have minimum skill requirements, and researched enemy organs can provide damage bonuses. A guide also notes that software affects technical skill levels and is capped at level 3 per category.
Character attributes, technical skills, combat weapon skills, and operating-system upgrades supported by the supplied System Shock 2 reference windows.
Explanations prepared with GPT-6 Luna and checked against the linked references. These are source-reviewed guides. They do not establish independently tested optimal builds or exact upgrade budgets. How coverage works.
