Field skills
Arc fence
The field reference. Know what you’re working with.
tier i / unmodified preview
Cast power: 3.0 Cooldown: 6.5s Radius: 430 Post link reach: 430 Pulse interval: 0.40s Posts / lifespan: 4 / 35s No Survivor traits, items, permanent upgrades or weather modifiers.
build scaling
Scales with Engineering. Attack Speed shortens cooldowns.
automatic activation
4 posts, 35s lifespan, 430 link range. New replaces oldest. Low engineering damage every 0.4s; no stacking. +60% skill-hit damage to ordinary swarm enemies (not empowered variants).
unlock requirement
Clear wave 5 with at least 180 kills in one expedition.
specialization costs
Tier IV required. Refit ranks 1 / 2 / 3 open after clearing waves 10 / 14 / 17 and cost 65 / 115 / 180 scrap. Choose one branch per skill. Field training can instead spend an available upgrade choice. These previews do not unlock or purchase anything.