Sneak
| Skill Sneak | |
|---|---|
 | |
| Modifies | Chance of being detected while sneaking |
| Initial level | 5% + 3 x Agility |
| Related perks | Silent Running, Ghost, Silent Death, Thief |
| 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 is subject to many modifiers, its mechanics differ from those of Fallout1/2.
- FOV: When your character is out of the opponents Field Of View, the sneak is automatically sucesfull.
- Minimum distance: Up to 3 hexes from opponent, your character is always visible, regardless your sneak skill.
- Bonuses:
- Ghost perk: +30% (can increase skill above 300%).
- Occluders: Standing behind scenery objects like barrels, tables (up to 2 hexes from them) gives you +50% bonus.
- Having active Stealth Boy in one of active slots gives 60%
- Penalties:
- Weight: -1% per 1 kg of the total weight of items you carry.
- Armor:
- Leather Armor and Leather Armor Mark II: -25%
- All metal armors and combat armors: -50%
- Powered armors: Sneak is disabled.
- Direction - direction of the opponent has big impact, basically, the area around opponent is divided into four parts, and each part modifies your sneak skill value as follows:
- Front: -75%
- Front-sides: -50%
- Back-sides: -25%
- Back: No penalty.
After all bonuses and penalties have been applied, the final formula, which determines the maximum distance between the observer and the (sneaked) observed at which the latter is visible is:
20 + opponent's Perception * 3 - previously calculated skill / 6
Viewing Range
This is the summary of viewing range against sneaking character. It assumes that there are no modifiers to the sneak skill.
F - Front FS - Front Sides BS - Back Sides B - Back
| Skill | Observer Perception | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F | FS | BS | B | Rng Mod | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 75 | 50 | 25 | 0 | 0 | 23 | 26 | 29 | 32 | 35 | 38 | 41 | 44 | 47 | 50 |
| 81 | 56 | 31 | 6 | -1 | 22 | 25 | 28 | 31 | 34 | 37 | 40 | 43 | 46 | 49 |
| 87 | 62 | 37 | 12 | -2 | 21 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 |
| 93 | 68 | 43 | 18 | -3 | 20 | 23 | 26 | 29 | 32 | 35 | 38 | 41 | 44 | 47 |
| 99 | 74 | 49 | 24 | -4 | 19 | 22 | 25 | 28 | 31 | 34 | 37 | 40 | 43 | 46 |
| 105 | 80 | 55 | 30 | -5 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 |
| 111 | 86 | 61 | 36 | -6 | 17 | 20 | 23 | 26 | 29 | 32 | 35 | 38 | 41 | 44 |
| 117 | 92 | 67 | 42 | -7 | 16 | 19 | 22 | 25 | 28 | 31 | 34 | 37 | 40 | 43 |
| 123 | 98 | 73 | 48 | -8 | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 39 | 42 |
| 129 | 104 | 79 | 54 | -9 | 14 | 17 | 20 | 23 | 26 | 29 | 32 | 35 | 38 | 41 |
| 135 | 110 | 85 | 60 | -10 | 13 | 16 | 19 | 22 | 25 | 28 | 31 | 34 | 37 | 40 |
| 141 | 116 | 91 | 66 | -11 | 12 | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 | 39 |
| 147 | 122 | 97 | 72 | -12 | 11 | 14 | 17 | 20 | 23 | 26 | 29 | 32 | 35 | 38 |
| 153 | 128 | 103 | 78 | -13 | 10 | 13 | 16 | 19 | 22 | 25 | 28 | 31 | 34 | 37 |
| 159 | 134 | 109 | 84 | -14 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 |
| 165 | 140 | 115 | 90 | -15 | 8 | 11 | 14 | 17 | 20 | 23 | 26 | 29 | 32 | 35 |
| 171 | 146 | 121 | 96 | -16 | 7 | 10 | 13 | 16 | 19 | 22 | 25 | 28 | 31 | 34 |
| 177 | 152 | 127 | 102 | -17 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 | 33 |
| 183 | 158 | 133 | 108 | -18 | 5 | 8 | 11 | 14 | 17 | 20 | 23 | 26 | 29 | 32 |
| 189 | 164 | 139 | 114 | -19 | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25 | 28 | 31 |
| 195 | 170 | 145 | 120 | -20 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 |
| 201 | 176 | 151 | 126 | -21 | 3 | 5 | 8 | 11 | 14 | 17 | 20 | 23 | 26 | 29 |
| 207 | 182 | 157 | 132 | -22 | 3 | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25 | 28 |
| 213 | 188 | 163 | 138 | -23 | 3 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 |
| 219 | 194 | 169 | 144 | -24 | 3 | 3 | 5 | 8 | 11 | 14 | 17 | 20 | 23 | 26 |
| 225 | 200 | 175 | 150 | -25 | 3 | 3 | 4 | 7 | 10 | 13 | 16 | 19 | 22 | 25 |
| 231 | 206 | 181 | 156 | -26 | 3 | 3 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 |
| 237 | 212 | 187 | 162 | -27 | 3 | 3 | 3 | 5 | 8 | 11 | 14 | 17 | 20 | 23 |
| 243 | 218 | 193 | 168 | -28 | 3 | 3 | 3 | 4 | 7 | 10 | 13 | 16 | 19 | 22 |
| 249 | 224 | 199 | 174 | -29 | 3 | 3 | 3 | 3 | 6 | 9 | 12 | 15 | 18 | 21 |
| 255 | 230 | 205 | 180 | -30 | 3 | 3 | 3 | 3 | 5 | 8 | 11 | 14 | 17 | 20 |
| 261 | 236 | 211 | 186 | -31 | 3 | 3 | 3 | 3 | 4 | 7 | 10 | 13 | 16 | 19 |
| 267 | 242 | 217 | 192 | -32 | 3 | 3 | 3 | 3 | 3 | 6 | 9 | 12 | 15 | 18 |
| 273 | 248 | 223 | 198 | -33 | 3 | 3 | 3 | 3 | 3 | 5 | 8 | 11 | 14 | 17 |
| 279 | 254 | 229 | 204 | -34 | 3 | 3 | 3 | 3 | 3 | 4 | 7 | 10 | 13 | 16 |
| 285 | 260 | 235 | 210 | -35 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 9 | 12 | 15 |
| 291 | 266 | 241 | 216 | -36 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 8 | 11 | 14 |
| 297 | 272 | 247 | 222 | -37 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 7 | 10 | 13 |
| 303 | 278 | 253 | 228 | -38 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 9 | 12 |
| 309 | 284 | 259 | 234 | -39 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 8 | 11 |
| 315 | 290 | 265 | 240 | -40 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 7 | 10 |
| 321 | 296 | 271 | 246 | -41 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 9 |
| 327 | 302 | 277 | 252 | -42 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 8 |
| 308 | 283 | 258 | -43 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 7 | |
| 314 | 289 | 264 | -44 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | |
| 320 | 295 | 270 | -45 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | |
| 326 | 301 | 276 | -46 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | |
| 307 | 282 | -47 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | ||
| 313 | 288 | -48 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | ||
| 319 | 294 | -49 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | ||
| 325 | 300 | -50 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | ||
Also, note that your character won't be visible when he is out of observer field of view range, which depends on Perception and look direction. Table below shows summary of FOV ranges.
| Observer PE | Front | Front-Side | Back-Side | Back |
|---|---|---|---|---|
| 1 | 23 | 19 | 14 | 12 |
| 2 | 26 | 21 | 16 | 13 |
| 3 | 29 | 24 | 18 | 15 |
| 4 | 32 | 26 | 20 | 16 |
| 5 | 35 | 28 | 21 | 18 |
| 6 | 38 | 31 | 23 | 19 |
| 7 | 41 | 33 | 25 | 21 |
| 8 | 44 | 36 | 27 | 22 |
| 9 | 47 | 38 | 29 | 24 |
| 10 | 50 | 40 | 30 | 25 |
| 9 + Sharpshooter | 53 | 43 | 32 | 27 |
| 10 + Sharpshooter | 56 | 45 | 34 | 28 |
Note : Having active motion sensor (in an active slot) gives +2 Perception for the purpose of sneakers detection (it's not capped at 10).
