Coilgun

What it is

Coilgun is an epic-rarity precision energy weapon shaped like a rifle. Each shot fires a single homing energy slug at the closest enemy at long range with a slow, deliberate cadence. Damage tag is energy. Punchier per-shot damage than the auto rifle with heavier scaling and a faster, larger projectile, balanced by a slower fire rate so overall DPS sits near the rifle baseline. Pairs with line and magnetar for an all-energy build.

Identity

Field	Value
Rarity	epic
Family	projectile
Damage tag	energy
Damage type	normal (routes through shield)
Target mode	closest
Collision mode	first hit
Area mode	bonus explosion
Scaling curve	linear
Can hit destructibles	yes
Can retarget	no
Warmup	0.20 s
Travel range multiplier	3.5 × acquire range

See target modes, damage tags, collision modes, scaling curves.

Stats by level

Base stats from the weapon spec, evaluated as base + scaling * (level - 1).

Stat	L1	L10	L20
Base damage	95	545	1045
Fire rate (shots/s)	1.80	24.30	49.30
Projectile count	1	1	1
Projectile speed (units/s)	700	772	852
Projectile size (units)	7.0	8.35	9.85
Acquire range (units)	240	276	316
Travel range (units)	840	966	1106
Homing strength	999	999	999
Spread	0°	0°	0°
Warmup (s)	0.20	0.20	0.20

Effective per-shot damage after the global damage multiplier curve (includes early-level buff):

Level	Base damage	Level multiplier	Effective damage per shot
L1	95	1.30	123.50
L10	545	2.50	1362.50
L20	1045	7.50	7837.50

Behavior

• Picks the closest enemy in acquire range on each fire.
• Single energy pulse-ball slug per shot, no spread.
• Near-perfect homing — projectile locks to its target at fire time and tracks it until impact or range expiry.
• Round despawns on first enemy hit (no pierce).
• Does not re-acquire if its original target dies mid-flight.
• Damages destructible scenery.
• Travel range equals 3.5× the current acquire range, giving long reach per shot.
• Cadence is slow and deliberate at L1 (one shot every ~0.56 s) and ramps up sharply with level.
• Area horizontal modifiers feed the bonus-explosion area mode (see weapons).

Scaling

Linear curve — effective level equals nominal level at every step. Damage, fire rate, acquire range, projectile speed, and projectile size all grow linearly with level via their respective base + scaling * (level - 1) formulas. Projectile count, homing strength, spread, warmup, and travel range multiplier are flat across all levels.

Stat	Base	Per-level	L1	L10	L20
Base damage	95	+50.00	95	545	1045
Fire rate	1.80	+2.50	1.80	24.30	49.30
Acquire range	240	+4	240	276	316
Projectile speed	700	+8	700	772	852
Projectile size	7.0	+0.15	7.0	8.35	9.85

Final on-hit damage = base damage × the global per-level damage multiplier (see damage multiplier curve).

Horizontal modifiers

Modifier	Rate
Damage per H	0.04
Fire rate per H	0.10

See horizontal modifiers for how H-stacks compound and how the Area horizontal modifier feeds the bonus-explosion area mode.

EXTRACT-CANDIDATE flags

• EXTRACT-CANDIDATE: concept-scaling-curves should document the six curve types (linear, exponential, steep_exp, front_loaded, s_curve, linear_fast) and their t -> curvedT formulas.
• EXTRACT-CANDIDATE: concept-damage-multiplier-curve should document the piecewise-linear anchors [1, 1.00], [4, 1.25], [8, 2.00], [12, 3.00], [16, 5.00], [20, 7.50] and the low-level early-game buff (+30% at L1, -5% per level, 0% at L7+).
• EXTRACT-CANDIDATE: concept-target-modes should enumerate closest, furthest, flanking, low_hp with selection rules.
• EXTRACT-CANDIDATE: concept-collision-modes should enumerate first_hit, pierce_all, target_only, beam_trace, chain_arc.
• EXTRACT-CANDIDATE: concept-damage-tags should enumerate bullet, energy, bomb, fire and the legendary secondary-tag rule.
• EXTRACT-CANDIDATE: concept-area-modes should enumerate the eleven area modes including bonus_explosion and how the Area horizontal modifier maps to each.
• EXTRACT-CANDIDATE: concept-horizontal-modifiers should document the dmgPerH / ratePerH rates and how H-stacks compound, including the RANGE_SCALE_PER_H constant that lengthens acquire range and projectile travel.
• EXTRACT-CANDIDATE: concept-travel-range-multiplier (new) should document how travelRangeMult extends projectile lifetime past acquire range — used by coilgun (3.5×), line (3.0×), rifle (2.4×) and others.
• EXTRACT-CANDIDATE: concept-bullet-archetypes (new) should document the shared pulse_ball archetype reused by rifle and coilgun — same projectile pipeline, recolored per weapon, no engine variation between them.
• EXTRACT-CANDIDATE: concept-warmup (new) should document the warmupSec startup delay before a weapon first fires on a run, used by most projectile weapons.