PVP
Hunting other players is possible, deliberate, and expensive. There is no way to do it by accident and no way to do it quietly.
Where
Only outside safe zones. Green locations are closed to it entirely.
If you spend your time in green territory, no other player can start a fight with you.
In red zones, a kill also takes part of the victim's inventory. See HELP > World > Red zones.
Ambush
Ambush and Protection are the only ways to attack another player. You take up position at a location and wait for someone to walk into it.
Your character rolls for a target regularly. Whether you spot one depends on your Stealth skill, on the ambush gear on your belt, and on how distracted they are: someone else lying in ambush is the easiest catch, someone traveling is easy, someone gathering or crafting is harder, and someone hunting an enemy is hardest of all. Targets are also easier to spot in red zones.
Ambush gear does not stack. Only the best piece you are carrying counts, so there is nothing to gain from filling your belt with them.
The Perception skill increases a target's chance to slip away from an ambush that has already spotted them.
People already in a fight, and people under Off the Grid, cannot be targeted.
A successful ambush drops you both straight into a fight.
Protection
Protection is an ambush that hunts the hunters. It only targets people lying in ambush on the tile, or anyone still marked as an Outlaw.
Unlike an ambush, Protection works in any zone except settlements, so you can hunt down Outlaws in safe zones too.
You cannot start Protection while you are marked as an Outlaw yourself.
Spotting works exactly like an ambush, with the same skills, gear and math.
It never marks you as an Outlaw, so killing an Outlaw this way is not a crime. It does break your Off the Grid.
Ambush math
The roll happens every 10 seconds against one random valid person on the tile:
P(spot per minute) = activity penalty × 1.75 × zone × (1 + stealth bonus×0.1 + gear %/100)
zone is 1.15 in red zones and 1 everywhere else.
P(spot this tick) = 1 − (1 − P_minute)^(10/60)
If that hits, they can still slip:
P(catch) = P(spot) × (1 − perception) × (1 − other skill bonuses)
Ambush calculator
Fill in your side and the target’s to see the chances, with the formula above. Protection spots the same way. Nobody can be targeted in green zones, in a fight or under Off the Grid.
Outlaw
Lying in ambush in a yellow zone marks you as an Outlaw, and every further ambush resets the clock. Red zones never mark anyone, and neither does Protection.
An Outlaw cannot enter a settlement.
Everyone can see it. Killing an Outlaw is not a crime.
Off the Grid
If an Outlaw kills you unprovoked, you get Off the Grid: for some time no other player can start a fight with you.
It breaks the moment you take hostile action yourself.