Iron Marines+ Mission 19 Guide: How to Beat Cold as Ice With Mark X

To beat Mission 19 (Cold as Ice) in Iron Marines+, use Mark X as a frontline anchor to absorb initial volleys while you secure narrow chokepoints and capture Ether nodes. Boreas forces heavily punish fragile squads that wander into the fog of war. Keeping Mark X ahead of your damage dealers prevents costly unit casualties and preserves your Ether reserves for base defenses.

Managing Mark X on the Frontline

Mark X functions as a durable damage sponge. Sending infantry or snipers ahead down icy corridors quickly drains your Ether pool when they run into fortified enemy positions.

Keep these tactical rules in mind when controlling Mark X:

• Scout chokepoints first: March Mark X ahead to trigger enemy missile strikes and static turret fire before moving squishier units into range.
• Preempt heavy bursts: Activate defensive plating and shield skills immediately upon engaging elite packs or defense clusters, rather than waiting for critical hull damage.
• Fall back to repair: When shields break, retreat Mark X toward allied turrets so armor can regenerate while your backline provides covering fire.
• Maintain frontline spacing: Anchor Mark X between advancing enemy swarms and your fragile ranged damage dealers at all times.

Securing the Dropzone and Ether Nodes

Mission 19 opens with a resource bottleneck. Hostile patrols descend quickly from the northern and eastern paths, requiring you to stabilize the landing zone before attempting an offensive push.

1. Establish perimeter defense: Set up base defenses immediately at the starting dropzone to suppress approaching light infantry.
2. Deploy an initial defensive squad: Field basic infantry backed by brawlers or snipers to hold the perimeter while Mark X clears local threats.
3. Capture the nearest Ether node: Once the opening assault waves are cleared, advance directly to the closest Ether refinery. Securing early income provides the operational budget required to replace fallen units and upgrade defensive structures.

Defensive Turret Setup

Enemy counterattacks frequently target isolated command structures and captured Ether nodes while your strike team pushes forward. Leaving nodes unprotected will collapse your economy. Place complementary turret types at intersection points to defend against multiple armor classes.

Pairing rapid-fire turrets with heavy missile installations strips enemy shields and destroys armored units before they reach structural firing range.

Recommended Strike Force Composition

Pushing deeper into the sector requires a balanced squad that addresses both swarms and fortified armor:

• Vanguard Tank (Mark X): Absorbs burst fire, disrupts enemy lines, and anchors territory.
• Anti-Armor Core (Snipers or Brawlers): Destroys heavy walkers and fortified defensive structures from safe positions.
• Area Denial (Flamethrowers or Rocketeers): Rapidly incinerates clusters of light infantry.
• Support / Utility (Combat Engineers or Aerial Defense): Repairs friendly mech armor and eliminates incoming flying units.

When capturing forward base sites, hold your ground until the build phase finishes. Keep Mark X stationed on-site with a defensive squad and complete the local turret grid before advancing toward the final stronghold.

Final Stronghold Siege Tactics

The final enemy installation is defended by automated cannons, heavy walkers, and continuous unit spawners. Directly rushing the central objective will wipe your squad. Execute a methodical siege sequence instead:

1. Dismantle outer turrets: Send Mark X in to soak defensive artillery while snipers and long-range units eliminate outer emplacements one by one.
2. Destroy reinforcement spawners: Target enemy barracks and fabricators before firing on the primary command structure to stop continuous waves.
3. Lock down reinforcement lanes: Drop area-of-effect abilities or combat items onto converging choke points whenever fresh enemy packs advance.
4. Focus the core objective: Once base turrets and production buildings fall, focus all available firepower from Mark X and your surviving squads onto the main installation.