Three Ways Through the Gate

ApproachProcedureResult
Destroy the WardenReduce the mech to 0 HP. Repair drones can restore it unless disabled.The party can open the gate without further checks and recover its command core.
Open the Gate Under FireGain 4 Gate Progress. A creature adjacent to either console can spend 2 actions and attempt a DC 17 Computers, Crafting, or Thievery check. Success gains 1 Progress; critical success gains 2. A character can Force a jammed linkage with a DC 19 Athletics check.At 4 Progress, the iris opens. The mech continues fighting, but the party can escape by moving through the gate.
Resonance CollapseGain 3 Resonance Progress while both twins are adjacent to the gate. A PC spends 2 actions to guide them and attempts a DC 16 Arcana, Diplomacy, Occultism, or relevant Lore check. Failure causes 1d6 force damage to both twins; critical failure also resets 1 Progress.At 3 Progress, the twins tear the repair rail from the ceiling. The mech is immobilized and the gate opens one round later.

If the twins' Trust is 2 or higher, the first Resonance Collapse check gains a +1 circumstance bonus. At Trust 0, they refuse unless a PC first succeeds at a DC 17 Diplomacy check.