Fieldrunners 2 for iPad for iPad: Flash Fire Heroic 3-Star Guide

To earn a 3-star rating on Flash Fire on Heroic difficulty in Fieldrunners 2 for iPad for iPad without using consumable items, build a concentrated kill zone where the entry lanes converge in the center. Securing all 20 lives requires crowd control over brute force: anchor the intersection with slow and poison fields early, then transition into targeted anti-armor towers before heavy vehicles breach the core.

Required Tower Loadout

Do not bring consumable items like mines, rewinds, or airstrikes. Clear the stage using this five-tower loadout:

Gatling Tower: Inexpensive early defense used to shape runner pathing and finish weakened infantry.
Glue Tower: Essential crowd control that pins units inside your damage zones.
Gas Tower: Area-of-effect poison that bypasses armor and eliminates tightly packed swarms.
Spark Tower (or Plasma Tower): Heavy single-target energy damage designed to burn through elite mechanical units.
Rocket Tower (or Mortar Tower): Long-range splash damage to soften incoming enemy groups before they reach the center.

Early-Game Setup: Waves 1–19

Enemy runners enter from multiple paths before merging near the center. Splitting defenses across individual entry points reduces your damage efficiency and leads to early leaks.

Anchor the intersection: Place two Gatling Towers near the central bridge intersection. These direct pathing and eliminate early foot soldiers. Keep them at Tier 1 or Tier 2 to conserve cash.
Apply speed control: Build a Glue Tower directly adjacent to the intersection as soon as initial kill funds arrive.
Establish lingering damage: Place a Gas Tower directly opposite the Glue Tower. Slowed runners will take continuous poison damage while your Gatling Towers focus down the survivors.

Mid-Wave Transition: Waves 20–45

Starting around Wave 20, the map introduces armored bikers, heavy tanks, and shielded marchers. Pure poison and standard bullet fire cannot destroy high-health targets alone. Follow this upgrade sequence to manage armored waves:

Priority	Target Tower	Purpose
1	Upgrade Glue Tower to Tier 2	Increases the slow percentage and prolongs choke point exposure.
2	Build Spark Tower behind core	Delivers high sustained damage to lead tanks without targeting basic swarms.
3	Upgrade Gas Tower to Tier 2	Increases poison cloud density to strip health from dense groups.
4	Build secondary Gatling Tower on flank	Cleans up fast runners escaping the central gas cloud with low health.

Avoid scattering un-upgraded damage towers around the outer edges of the map. In Fieldrunners 2 for iPad for iPad, concentrating upgrades on centrally placed towers provides far more damage per dollar than spreading Tier 1 towers across open space.

Late-Game Defense: Surviving the Final Assault

The final waves feature high-speed runners backed by heavy armor columns. Shift all remaining capital into maximum tower tiers:

Upgrade the Spark Tower to Tier 3: Maximum beam damage is required to melt heavy armor before it leaves the central intersection.
Upgrade the Glue Tower to Tier 3: A max-tier slow practically stops heavy units inside the poison cloud, giving single-target towers maximum time to fire.
Add long-range approach coverage: If extra cash accumulates during the final ten waves, build a Rocket Tower or a second Spark Tower aimed at the incoming route to weaken tanks early.
Emergency recoveries: If an armored unit slips past the main choke point, immediately sell peripheral Tier 1 Gatling Towers to finance a Tier 2 Gatling or Spark Tower directly along the runner's exit path.