Sneak

Skill Sneak
Modifies	Chance of being detected while sneaking
Initial level	5% + 3 x Agility
Related perks	Silent Running, Ghost, Thief, Ninja, Assassin, Scout
Related traits	Small Frame

"Quiet movement, and the ability to remain unnoticed. If successful, you will be much harder to locate. You cannot run and sneak at the same time, unless you take Silent Running perk."

Sneak allows a player to become totally invisible, unless he performs an attack. If he has the Silent Running perk, he can even run while being sneaked, which allows him to infiltrate enemy lines, for example. However, players can see you if you get too close to them, depending on many things (See the Modifiers section for more information).

Note: You can enter Turn-Based combat sneaked, but if you are not Assassin you can't enter sneak once Turn-Based combat has started.

Modifiers

Sneak is subject to many modifiers, its mechanics differ from those of Fallout1/2. These modifiers are constantly checked by the game:

positive:

- +1 Stealth per 1 sneak skill
- +50 per Sneaky armor perk
- +50 and 50 near wall(together 100) for Ninja synergy
- +50 for Radiated Ear
- +50 and 50 near wall(together 100) for Stealth Boy
- +100 near wall for Ghost Effect
- +50 for War Event Sequence and Stealth bonus
- +10 per Strength for Deathclaw Perk

negative:

- -50 stealth when wearing tier 1 robes
- -150 stealth when wearing tier 3 robes
- -10000 stealth when wearing combat/metal/power armors
- -9 per opponent Perception
- -8 per opponent Perception when wearing Military binoculars
- -150 for wearing heavy weapon
- -75 for wearing rifles
- -100 while running
- -150 for active explosives

Actions that make you visible again

The following actions may remove your sneak, and make you visible again to your enemies' eyes.

- Attacking.
- Running (If you haven't taken the Silent Running perk).
- Wearing a powered armor, as said above (PA, APA, etc).
- Looting containers and bodies by "take all".
- Looting bodies while sneaked has 50% chance of desneaking.
- Picking up items from the ground while sneaked demands successful steal test. The weight is checked.
- When using Pickup All hotkey.
- Mining or chopping wood.
- Dismantling items.
- Active Motion Sensor reveals all critters in 15 hexes radius (whether behind a wall or not). It consumes Small Energy Cells and Micro Fusion Cells. Use Science on it to see remaining charges.

Formula

Simplified :

The opponent is invisible whenever its distance from the observer increased by final Sneak/6 is larger than observer's FRONT sight range (regardless of the actual direction).

Scientific :

To count sight:

20 as base

+3 per pe(capped at 20 pe)

+6 for sharpshotter

+11 for tacticals

+10 for WE FoV/Super Range

+1 for critical chance(bounty hunter)

+5/-5 for randomboy roll

-2 for confusion

-50% for leader

Remember that sight is limited how person look

100% on front

80% on sidefront

50% on sideback

20% on back

To count sneak detection

+8 for WE FoV

+16 for Super Range

-1 for INT

+1 for PE(doubled when using binoculars)

+35 RobCo Sensor

+25 for Awareness perk

To count Stealth:

+1 for 6% Sneak skill

+8 for ghost effect(standing near wall)

+8 for ninja ghost effect(standing near wall)

+4 for stealth boy ghost effect(standing near wall)

+4 for stealth boy mk.2 ghost effect(standing near wall)

+8 for stealth boy mk.3 ghost effect(standing near wall)

+8 for standing ghost effect(standing near wall)

-16 for running

+4/+8/+16/+25/+33 for camo/military camo/stealthboy/stealthboymk2/stealthboymk3

-1 for endurance(scout)

-15 for using combat robe/blue suit

-9999 for using metal/combat/power armor

+8 for sneaky perk

+8 for ninja

+16 for Assassin battle timer

+4 for st(deathclaw)

+20 for gain st(deathclaw)

+8 WE SQ

+16 Super Regen

-1 for AG

+8 for cannibal drug(+16 regulator)

Capped at 166 when you are not scout

Example

306 sneak = 51

ghost standing stealthboy = 44

2 sneaky = 16

WE perks = 24

cannibal = 8

ninja = 8

on battle timer u would have 166 = cap

vs bh max sight with robco sensor

FoV: 198

Sneak Detection: 80

166 - 80 - 86

198 - 86 = 112

you can see best non-scout sneak for 112 hexes