Field skills
Rolling thunder
The field reference. Know what you’re working with.
tier i / unmodified preview
Cast power: 110.0 Cooldown: 22.0s Radius: 230 Shells / cast: 3 First impact: 1.2s No Survivor traits, items, permanent upgrades or weather modifiers.
build scaling
Scales with Elemental damage. Attack Speed shortens cooldowns.
automatic activation
Mark three staggered artillery strikes. A 1.2-second fuse gives the horde time to gather. Explosion damage and size apply. +60% skill-hit damage to ordinary swarm enemies (not empowered variants).
unlock requirement
Clear wave 10 with at least 300 kills in one expedition, or recruit Demolitionist.
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.