Combat Stats

This page explains statistics seen in the Combat stats C menu and certain other statistics that aren't listed anywhere.

Combat stats: Base

State

Health

Your health, hit points or HP. You die if it drops to zero.

Derived from character level and Constitution. Can be affected by feats and items. Player character has 35% bonus health. If playing on easy difficulty, player health is roughly doubled. (The extra health received assumes player has average Constitution.)

Shield

Your Shield Emitter's shield capacity.

Psi

Your Psi points. Used by psi abilities. Characters regenerate 20 psi per turn as of version 0.1.14.0.

No longer derived from character level and Will as of version 0.1.14.0, but can be affected by feats and items.

Base abilities

Main article: Base abilities

Your effective base ability scores are listed in the combat stats menu. Any bonuses and penalties you may have to their base values are included in these scores.

Combat stats: Defense

Defense

Status effects and attacks can be resisted (ie. completely avoided) with Dodge, Evasion, Fortitude and Resolve, depending on the attack's type.

These four defensive skills are checked against attacker's relevant skill, e.g. An attack with Frighten would test attacker's Thought Control vs. defender's Resolve.[1]

The chance to resist them this way is capped at 65%.[2]

Dodge

Chance to avoid melee attacks and traps.

Equal to your effective Dodge skill. Can be affected by feats and items.

Evasion

Chance to avoid ranged attacks. Reduces damage from AoE attacks.

Equal to your effective Evasion skill. Can be affected by feats and items.

Fortitude

Chance to resist physical psionic effects and physical effects like poison, flashbangs, etc.

Derived from character level and Constitution.

Resolve

Chance to resist mental psionic effects. Reduces damage from some psi abilities, e.g. Neural Overload.

Derived from character level and Will.

Crit. chance

Chance to be critically hit.

Can be affected by feats and items.

Armor penalty (previously known as Encumberance)

Reduces your Movement Points, Dodge, Evasion and Stealth.

Derived from the armor pieces you're wearing. Can be affected by feats. It is capped at 95%.[3]

Resistances

All characters have Damage Resistance and Damage Threshold for each damage type. Resistance is a percentage reduction, whilst threshold is a flat number reduction.

Only the greater of the two reductions will be applied against any one attack, not both.

The resistible damage types are Mechanical, Heat, Cold, Electricity, Acid, Energy and Bio.

Irresistible damage

Some sources of damage cannot be mitigated with armor.

• The bio damage from poisons ignores armor.
• The electric damage from Neural Overload is irresistible, but can be reduced by Resolve. Mitigation for this is capped at ~40%.
• Some psi abilities also deal irresistible mental damage.

Shielding

Energy shields can absorb certain amounts of damage based on the damage's impact speed. Slower impact speeds are generally better against energy shields.

All damage sources have an Impact Speed, which is one of the following:

Very Low — Melee attacks

Low — Slow projectiles (considerably slower than bullets, such as crossbow bolts and cryokinesis)

Medium — Bullets, shrapnel (from frag grenades/mines)

Fast — Explosives, extremely fast projectiles (such as those fired from sniper rifles)

Very Fast — Lasers, plasma, electrical attacks

Additionally, most types of melee attacks will ignore certain amount of shield.

60% — Knives

80% — Fist weapons

100% — Unarmed

Subterfuge

Stealth

Your effective stealth skill level.

Equal to your effective Stealth skill. Can be affected by feats and items.

Detection

Your chance to detect stealthed enemies and traps. Finding secret areas is based purely on Perception instead of Detection.

Derived from character level and Perception. Can be affected by feats and items.

Combat stats: Offense

Weapon

Damage

Derived from active weapon. Affected by relevant weapon skill and strength bonus for melee weapons.

Action Points

Derived from active weapon. Can be affected by feats, items and dexterity bonus for light weapons.

Impact Speed

Derived from active weapon. Affects energy shield penetration.

Critical chance

Derived from active weapon. Can be affected by feats, items and dexterity bonus for melee weapons.

Critical bonus

Derived from active weapon. Can be affected by feats.

Initiative

Base initiative is 5 + agility + dexterity.

• At the start of the combat, each combat participant randomly adds 1-15 points to the base initiative.
• The modified value is used when sorting the turn order.

Exception: when the player initiates combat manually Enter or by simply attacking. In this case the player will always act first, but the AP cost of the opening attack/action will be deducted from the player's first turn. Additionally, this also applies to some other non-combat action performed just before entering combat, such as opening doors.

• Initiating combat from stealth adds 100 to initiative.

Range

Derived from active weapon. Unarmed range can be increased with Force Emission.

Optimal Range

Derived from active weapon. Attacker suffers additional range penalties when attacking beyond the optimal range.

Metathermics

Critical chance

Can be affected by feats and items.

Critical bonus

Can be affected by feats and items.

Psi cost

Can be affected by feats and items.

Psychokinesis

Critical chance

Can be affected by feats and items.

Critical bonus

Can be affected by feats and items.

Psi cost

Can be affected by feats and items.

Thought Control

Critical chance

Can be affected by feats and items.

Critical bonus

Can be affected by feats and items.

Psi cost

Can be affected by feats and items.

Unlisted statistics

These statistics aren't listed in the combat menu or any other menus.

Character level

Character level is shown on the bottom right corner of portrait. The maximum level is 25. Prior to version 0.1.14.0, it was 20.

• Level does not directly affect most character's stats. Exceptions to this are health, fortitude, resolve and detection.
  • Characters gain 40 skill points every level
  • Characters gain a feat every 2 levels
  • Characters gain a base ability point every 4 levels

• NPCs have natural dodge and evasion bonus equal to their level.

Classic XP System The experience needed to level up is completely linear, each level requiring 1250 experience more than the former. Experience is gained from quest completion, kills, skill usage, finding secrets and oddities. Classic XP/level chart Level Exp to next level Cumulative exp 1 1 250 1 250 2 2 500 3 750 3 3 750 7 500 4 5 000 12 500 5 6 250 18 750 6 7 500 26 250 7 8 750 35 000 8 10 000 45 000 9 11 250 56 250 10 12 500 68 750 11 13 750 82 500 12 15 000 97 500 13 16 250 113 750 14 17 500 131 250 15 18 750 150 000 16 20 000 170 000 17 21 250 191 250 18 22 500 213 750 19 23 750 227 500 20 25 000 262 500 21 26 250 288 750 22 27 500 316 250 23 28 750 345 000 24 30 000 375 000 25 31 250 406 250

Oddity XP System The experience needed to level up starts off completely linear with each level requiring 1 more experience than the former, but stops at 25 XP/level. Experience is gained only from oddities studied and quest completion. Oddity XP/level chart Level Exp to next level Cumulative exp 1 5 5 2 6 11 3 7 18 4 8 26 5 9 35 6 10 45 7 11 56 8 12 68 9 13 81 10 14 95 11 15 110 12 16 126 13 17 143 14 18 161 15 19 180 16 20 200 17 21 221 18 22 243 19 23 266 20 24 290 21 25 315 22 25 340 23 25 365 24 25 390 25 25 415

Action and movement points

• All characters have 50 AP. They can be used for any action, including moving. Most actions consume AP, but there are exceptions. (e.g. Special Tactics)

Wearing heavy armor without meeting its strength requirement will reduce action points.[4]

AP can be temporarily increased or decreased. Debuffs cannot drop AP below 35.

• Character base movement points equal 30 + extra 3 points for every point in agility above 5. Movement points can only be used for moving.

Movement points are affected by agility, armor penalty or bonus, encumberance and some feats.

Some effects that change movement points also change real-time movement speed.

Some creatures, such dogs and spawn, have natural bonus to movement points.

Precision

Precision or chance to hit determines chance of an attack hitting its target and the precision of area of effect attacks. It is based on attacker's weapon skill and a large number of other factors. Precision is calculated the same way for both the player character and all non-player characters. Your precision is displayed on the right side of the attack cursor.

• Base precision (with zero attack skill against zero defense skill and no other modifiers) is 70%.
• Precision limits are 10 - 95% for targeted attacks, 0 - 100% for AoE attacks (such as grenades).
• Area of effect attacks will always hit targets within their radius, but they can land up to 3 tiles away from targeted location.
• Most psi attacks always hit their target. However, Pyrokinesis is an AoE attack. Its precision is derived from Metathermics skill. Status effects caused by psi abilities can be resisted with Fortitude (physical effects) or Resolve (mental effects).

Modifiers

Precision is affected by many different modifiers, especially in ranged combat. Some precision penalties cannot be mitigated with weapon skill alone.

Skill

Attack skill

Increases precision. The main factor in precision calculation.

Defense skill

Dodge/evasion can reduce chance to hit by up to 60% (if evasion/dodge rating is twice the attacker's effective attack skill)[5]

AoE attacks cannot be completely avoided with defense skill, but evasion decreases their damage.

Environment

Environmental modifiers affect chance to hit in ranged combat.

Darkness

Darkness plays a large role in ranged weapon precision. Most areas in Underrail are dark and the penalty is quite high at long ranges.

Darkness penalty can be completely counteracted with Night Vision, or lowered with flares and/or other ambient light sources.

Distance and optimal range

Precision decreases with distance for all ranged weapons including AoE weapons.

Precision further decreases beyond weapon's optimal range.

Weapon

Weapons can have additional modifiers to precision.

Low durability

Any Degraded Weapon or Heavily Degraded Weapon loses more precision the more degraded it is, all the way down to the minimal 10% chance to hit.

Move and Shoot penalty

Crossbows and rifles may have move penalty which decreases their precision if the user is not Focused. (Has moved during the current turn)

Close Quarters penalty

Crossbows and rifles may also have a precision penalty against foes at melee range. Close quarters penalty only applies In Combat against hostile targets.

Strength requirement

Rifles and sledgehammers have a strength requirement. Precision is decreased by about 10%^Verify for each point of strength below the requirement.

Other weapon modifiers

Weapons may have attachments or other modifiers that change their base precision or burst precision.