Part 4

Maintain distance from ALs and collect SMG ammo at the base of the ramp.

When three Vorts arrive after tunnel #12 lights up, stay at the ramp base and use its walls for cover (press the cover button to crouch behind walls or objects). Switch to the Shotgun (SG) and move up the ramp to the SMG ammo crate.

From the point where you drop through the floor until you reach the next section, expect approximately 90% ASAs and 10% ALs. Use narrow "S" curves and caverns for cover, relying on stalagmites and bends. Conserve ammo, using the Revolver for distant ASA shots and the Gravity Grenade (GG)/SG/Pistol for close-quarters combat (CQ).

The Vort is immune to ASA acid and can discharge electricity to damage ASAs. Stay ahead of the Vort to allow it to cover your rear, but don't get too far ahead or it will break defense and chase you. If you need a breather, turn around and cover the Vort until it catches up. Use the Vort's ability to upend ants; a single SG round or a couple of Pistol rounds will finish them.

ASAs easily dodge distant boulder attacks. For distant ASAs, use short 3-5 round SMG or Pistol bursts from cover, increasing damage and keeping them at bay until they splash. Use Zoom for accuracy and to minimize damage.

Follow the Vort from the ramp, past the lift gate, and into the tunnel. Use the GG to throw a boulder. Break through web #1, then a side web for SG ammo and/or larvae beads.

At the next path-blocking web, prepare for renewed action. If observant, you might see an ASA cross the tunnel from the next cavern. Continue to the ground larvae, stop, and use the GG on web #2. Move to just before web #2, hold position, and target ALs deep to the left past a small stalagmite with larvae. Throw a GG at the cave ceiling above the ALs, aiming for the lower of the two horizontal striations to destroy them.

Quickly switch to the SMG and sprint to the side of the stalagmite to confirm all enemies are eliminated. If so, switch to the SG and drop off the ledge. Run to the column, turn left, and activate the ALs and ASAs. Engage ALs with the SG at CQ, then switch to the SMG to snipe ASAs from a distance, aiming to group three for a HEG (High-Explosive Grenade). If not all three are eliminated, finish survivors quickly with the SMG.

Sprint along the next tunnel, leaving the Vort to handle remaining enemies.

A good weapon combo for ALs and ASAs is to use the GG to flip them onto their back or side, then quickly switch to the SG for a one-round kill.

Look for webs high up that may hide supplies.

To avoid extra ASAs and ALs in the next cavern, make the jump over the crevasse and proceed to the next tunnel. Access the side web for SMG ammo.

Turn 180 degrees and ensure your rear is clear until the Vort catches up. Run toward the larvae, stop before passing them to their right, and turn left to face an ASA. Eliminate it quickly, potentially taking a hit. Use the right side of the tunnel as cover from ASAs approaching from the far right tunnel, letting the Vort handle ALs.

Use the Revolver's zoom to drop two ASAs in the distant tunnel to your right, then switch to the SG. From the cavern's exit point (EP), locate the rising ledge/path to the cavern's XP (eXit Point) to the right. Face the far right tunnel from the EP, then sprint and jump the crevasse to the dogleg.

This maneuver can eliminate two or more ALs and/or ASAs before the Vort catches up. Rush the tunnel EP, SG any oncoming ALs, and be ready for ASAs.

Continue to the side web for SMG ammo. Around the next bend, there may be three ASAs and a couple of ALs. Use GGs, step to the leading edge, throw two GGs into the dips of the tunnel, then retreat and switch to the SG. If no enemies appear after a few seconds, move forward; ALs will often swing into view.

When clear, switch to the SMG and move forward, using dips and bends to reach surviving ASAs. Use the GG for close combat, then the SG. The Vort is usually nearby and will shock or kill any ASAs that breach the bend.

Locate and drop down the hole at the end of the tunnel. Collect items, then run to the boarded gate. Use the GG to break the boards and quickly enter the zombie (Z) filled room.

Sprint across the room to the wall and use the GG to detonate an explosive (ET). Back away from approaching Zs to create blast distance, then detonate. Collect items, use the GG on a barrel, and enter the next room. Use the GG on both speeders, then toss two barrels onto the elevator and carry the steel bundle onto it. Immediately drop the steel and use the GG on the security container (SC) in the elevator shaft niche on your way to the level below. For speed, use the GG to detonate two explosive barrels (ETs) into wandering Zs, then grab a barrel and slam the zombie barrel (ZB) as it attempts to exit the cage.

At Lift #2, which has a control panel with a snoozing ZB beside it, use the GG to collect three steel bundles from nearby and below the lift, then drop them onto the lift. Use the GG on an explosive (ET).