Iron Marines+ Fast Hero XP and Upgrade Farming Guide

To level heroes and collect upgrade resources quickly in Iron Marines+, run compact missions with immediate enemy waves or farm alien spawners continuously without destroying the source structure. Hero experience relies on active combat participation—scoring kills, dealing damage, and firing skills—making dense, repeatable wave encounters far faster than clearing expansive campaign maps.

Set Up an Infinite Creep Spawner Farm

Alien nests and egg clusters generate unending waves until destroyed. Leaving these structures intact lets you continuously funnel enemies directly to your hero.

1. Clear peripheral defenses: Destroy stationary turrets and eliminate dangerous ranged units surrounding the spawner cluster.
2. Anchor your hero at maximum attack range: Position your commander close enough to engage newly spawned swarms automatically without targeting the nest itself.
3. Restrain high-structure-damage units: Hold Snipers, Bouncers, and heavy mechs back at your defensive perimeter so their automated attacks do not accidentally destroy the spawner.
4. Fire active skills on cooldown: Unleash area-of-effect abilities into fresh creep packs to maximize combat participation and skill-use tallies.
5. Destroy the spawner to finish: Once you hit your target level threshold or incoming damage overwhelms your sustain, destroy the structure, complete the remaining objectives, and collect the mission rewards.

Target Short Encounters Over Sprawling Maps

Avoid lengthy campaign maps that require slow base expansion, Ether harvesting, and long troop travel times between checkpoints. Instead, repeatedly run compact Spec Ops operations or early-game campaign scenarios where swarms attack your perimeter immediately.

Even after collecting initial star rewards, rerunning quick missions consistently yields credits. Spend these surplus credits on tactical consumable drops, such as deployable turrets, land mines, and orbital strikes, to stabilize subsequent runs.

Prioritize Low-Cooldown Area Abilities

Because heroes idling behind automated bunker lines earn minimal combat progression, you must actively cycle abilities into swarms. Allocate early skill points into low-cooldown area-of-effect (AoE) powers rather than passive single-target bonuses.

Select the Right Difficulty for Your Goal

Adjust mission difficulty based on whether you need rapid character leveling or one-time upgrade gears:

• Casual Difficulty: Best for leveling low-ranked heroes. Enemies have smaller health pools and lower damage output, allowing squishy commanders to clear waves solo with minimal risk of death or revive delays.
• Normal Difficulty: Offers a baseline balance between wave density, clear speed, and standard credit payouts.
• Veteran and Impossible Difficulties: Best reserved for claiming first-clear difficulty-locked tech points and achievements. Avoid leveling low-rank heroes on Impossible, as high enemy health pools drastically slow down clear speeds.

Reinvest Resources into Core Upgrades

Channel earned credits and tech gears into general upgrades that improve clearing efficiency across all heroes. Prioritize infantry and support nodes on the tech tree that grant cooldown reduction, increased movement speed, and health regeneration. Cooldown reduction directly increases ability activation frequency, accelerating experience gains on every following farming run.