Gunstoppable Kane the Rat — Merchant Guide

Kane the Rat is Gunstoppable’s underground merchant — a black-market supplier who meets Fenix between major floors to sell powers, utilities, and augment services. Press materials and Steam descriptions position Kane as the friendly face of capitalism’s underbelly: he profits too, but aims firepower at the same billionaire warlords Fenix livestreams himself dismantling. Understanding Kane’s timing and inventory separates runs that stall on the robot crab from runs that cruise into Johnny Jetpack with Reaper-ready loadouts.

This guide covers when Kane appears, what to prioritize, and how his shop interacts with permanent upgrades, run modifiers, and tier lists. Pair with Items Hub, Campaign Walkthrough, and Controls.

Who is Kane the Rat?

Kane operates outside CEO supply chains — a rat-themed fixer with comedic dialogue and practical stock. Narratively he supports Fenix’s revenge arc alongside Fenix’s sister motivation referenced in campaign marketing. Gameplay-wise he is the primary run-economy sink between combat arenas.

Voice cast across Gunstoppable includes Gianni Matragrano and Neekolul, but Kane’s lines lean merchant banter — price jokes, black-market bravado, and warnings about upcoming executive arenas.

When Kane appears

Kane shops trigger between major floor transitions, especially before boss gates. Community routing from Campaign Walkthrough suggests:

• First visit — before the giant robot crab (Act I exit)
• Mid-campaign stops — before corporate enforcer and Johnny Jetpack
• Late visits — before warlord executive and CEO approach

Exact spawn rules may vary slightly by run seed, but plan purchases assuming one Kane stop per act minimum.

What Kane sells

Launch materials cite new powers purchasable from Kane alongside augment services. Observed categories include:

Movement and momentum perks

Speed cap increases, grapple cooldown trims, slide distance — all amplify Gunstoppable’s core damage multiplier. S-tier purchases for most builds in Builds Tier List.

Reload and dual-wield utilities

Alternate-fire speed, reload reduction, off-hand damage buffs — keep dual-wield stagger alive during bosses bullet hell.

Augment rerolls and attachment services

Hex-grid weapons need transform augments (flamethrower shotgun, banana-nuke launcher). Kane rerolls prevent B-tier weapons from stagnating — critical before Weapons Tier List demoted picks stall DPS.

Defensive utilities

Health on parry, shield shards, damage reduction while moving — katana builds buy these before CEO gate.

Reaper enhancements

Kill-chain requirement reductions, Reaper duration extensions — sync with Reaper Rush meta from Guides.

Priority buy order (general)

Run stage	Buy first	Skip early
Act I pre-crab	Reload trim, pistol buff	Raw damage on rocket
Act II city	Pierce reroll, black-hole utility	Cosmetic flair mods
Act III Johnny	Tracking buff, Reaper duration	Slow heavy augments
Act IV–V	Max momentum, parry heal	Duplicate damage types

Adjust when run modifiers already cover the same stat — avoid redundant spend.

Currency management

Run currency drops from elites and optional challenge rooms. Do not zero wallet entering boss arenas — keep emergency health or reroll funds if the next floor is known boss gate from Bosses Overview.

Meta currency from failed runs feeds permanent upgrades separately — Kane only takes run-scoped coins during active attempts.

Kane + tier list synergy

Example promotions from shopping:

• Shotgun buyer — reroll until flamethrower transform → jumps Weapons Tier List from B to A/S
• Grenade launcher buyer — banana-nuke service → meme build becomes CEO-viable
• Katana buyer — parry heal utility → stabilizes Reaper Rush

Document your shop RNG; tier lists describe averages, your run is specific.

Boss-specific shopping

Before robot crab

Reload perk + mid-range buff. Elevation fight from Robot Crab guide wants consistent pistol output, not slow rockets.

Before Johnny Jetpack

Tracking and vertical mobility — grapple cooldown if offered. Ground flamethrower augments low priority.

Before CEO gate

Reaper duration and momentum cap — final exam per Campaign Walkthrough.

Common mistakes

• Damage-only buys that slow movement — violates speed-damage core rule
• Full wallet spend with no reroll reserve for broken augment
• Ignoring dual-wield stagger — buying one-hand mega buff while off-hand stays weak
• Skipping Kane to rush boss — under-geared for shield phases

Related links

• Items Hub — all item systems
• Permanent Upgrades — between-run power
• Run Modifiers — in-run picks
• Tools — future shop calculators

Kane sells chaos. Fenix supplies momentum. Bring both to every boss gate.