Iron Marines+ Boss Guide: How to Beat Tyrant, Rob070, and Nexus

To defeat the primary campaign bosses Tyrant, Rob070, and Nexus in Iron Marines+, draw boss aggro with a durable hero, eliminate support minions as soon as they appear, and reposition squads immediately when attack indicators show on the ground. Maintaining continuous damage while evading area-of-effect hazards prevents sudden squad wipes during these encounters.

General Boss Tactics

Boss fights in Iron Marines+ test formation spacing and reaction speed. Clustered squads take severe splash damage from standard boss mechanics, so apply these fundamentals across all encounters:

• Lead with your hero: Direct your hero into combat first to draw the boss's attention. Bosses generally stick to their initial target, allowing fragile ranged units to attack safely from the perimeter.
• Prioritize minions immediately: Pause boss damage whenever support waves spawn. Eliminating adds prevents your frontline from being overwhelmed and stops auxiliary units from repairing or shielding the boss.
• Stagger squad positions: Never order all squads to the same coordinate. Spread your units across wide firing angles to ensure telegraphed attacks hit only one unit at a time.
• Hold reinforcement cooldowns: Save drop pods and emergency hero abilities for sudden casualties or high-pressure final phases rather than opening with them.

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How to Beat the Tyrant

The Tyrant relies on heavy ground slams, burrowing ambushes, and continuous alien brood spawns. Victory requires quick lateral movement and instant wave clears.

1. Anchor the boss facing away from squads: Position your hero in front of the Tyrant so directional strikes point away from your damage dealers.
2. Evade subterranean slams: Watch for ground vibration effects and floor warning indicators. Shift squads toward the room boundaries immediately to avoid the lethal slam radius.
3. Wipe swarms on spawn: Fire hero area-of-effect cooldowns the moment broodlings emerge.
4. Resume sustained fire: Direct snipers and ranged squads back onto the Tyrant once the arena is clear of secondary targets.

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How to Beat Rob070

Rob070 combines heavy armor with ballistic missile strikes and mechanical support drones. Success depends on dodging targeting reticles and neutralizing repair units immediately.

1. Scatter against targeting reticles: When bright targeting indicators track your units, order individual squads in different directions. Scattering prevents a single missile salvo from damaging multiple units.
2. Engage at proper ranges: Keep armored mechas or resilient hero units at mid-range to absorb machine-gun fire. Position snipers and heavy troopers at maximum weapon range behind perimeter cover.
3. Focus repair drones first: Rob070 periodically deploys aerial repair drones and heavy combat bots. Redirect all squad fire to the repair units instantly to prevent the boss from restoring health.
4. Clear combat drones: Detonate crowd-control abilities on remaining escort drones before refocusing full firepower on Rob070's chassis.

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How to Beat Nexus

Nexus is a multi-phase encounter centered around an invulnerable core, rotating shield generators, and broad energy beams.

1. Destroy terminal pylons during shield phases: Nexus cannot be damaged while its energy shield is active. Direct high-mobility squads to destroy the glowing power conduits and active pylons linked to the core.
2. Hold the center lane: Station your hero and primary combat squads near the center lane to intercept elite alien and mechanized reinforcements while your flank units destroy the power links.
3. Evade the sweeping core beam: Once the shields drop, Nexus exposes its core and charges a wide beam attack. Watch the charge animation and reposition your entire strike force away from the sweeping firing arc.
4. Burn the exposed core: Deploy all reserved hero abilities, orbital strikes, and focused fire on the unshielded core. Repeat this cycle until the boss is permanently destroyed.