On Thin Ice Walkthrough Chapter 4: Full Puzzle Solutions Guide

Beat the thrilling finale of Adventure Escape Mysteries with our comprehensive On Thin Ice walkthrough Chapter 4 guide, featuring all codes and combat tips.

Detective Kate Gray and Detective Murphy face their most dangerous case finale yet as a brutal blizzard locks down the city and a ruthless criminal syndicate tightens its grip. If you have reached the dramatic finale of Kate Gray's snowy investigation, this on thin ice walkthrough chapter 4 guide will lead you through every twist, trap, and puzzle solution. Navigating treacherous snowbanks, hacking security locks, and rescuing hostages can test any detective's resolve, making a dedicated on thin ice walkthrough chapter 4 essential for clearing the syndicate's fortified lair.

In this concluding chapter, players must bypass heavy perimeter security, outmaneuver high-tech surveillance drones, bridge a treacherous indoor chasm, and defeat syndicate leaders in tactical combat. Follow our step-by-step instructions below to ensure you escape the ice without missing a single clue.

Chapter 4 Overview & Key Inventory Items

Chapter 4 drops Kate and Murphy right outside the outer perimeter of Sticks’ fortified hideout. Before jumping into the puzzle sequences, understanding the gear and environmental tools you need to collect is critical. Managing your inventory effectively prevents unnecessary backtracking between the outdoor snowdrifts and the indoor cabin.

Item Name	Initial Location	Primary In-Game Purpose
Metal Spikes	Tarp perimeter entrance	Used as nails to secure the bridge planks
Vodka Bottle	Rubble pile under the snow	Clears ice and grime from the gate lock keypad
Hammer	Behind cabin curtain	Pulls exterior signs and secures bridge spikes
Wooden Beams & Planks	Cabin interior floor & exterior walls	Foundation support for the broken bridge walkway
Skylight Rod	Fireplace mantelpiece	Reaches the elevated golden ring near the ceiling
Ornate Rings (x3)	Fireplace, ceiling, and Murphy	Unlocks the secret mantelpiece descent mechanism
Chisel	Lower hideout workstation	Opens the locked decorative globe container
Pancake Syrup	Inside decorative globe	Poured into the generator to disable syndicate power
Stun Taser	Colt's unguarded backpack	Subdues Colt to obtain the hostage handcuff keys

Infiltrating the Hideout: Spikes, Vodka, and the Gate Code

The chapter begins outside Sticks’ makeshift compound. The entrance is concealed behind a heavy industrial tarp secured by spikes driven deep into the permafrost.

First, tap on the spikes holding the tarp down to pull them out. Do not discard these spikes; keep them safe in your satchel because they serve a crucial secondary purpose later inside the cabin. Once the tarp is pulled back, you will find yourself in an outdoor courtyard covered in deep snowdrifts.

Sweep away all loose snow across the perimeter to uncover six weathered wooden signs and a scattered pile of rubble. Inspect the rubble directly to grab an unopened bottle of high-proof vodka.

Next, inspect the frozen metal security box mounted to the main gate. The lock mechanism is completely iced over and cannot be manipulated by hand. Pour the vodka over the metal box to melt away the frost, revealing a digital numeric keypad. A single bullet hole is visible near the lock housing, which serves as your primary hint for the code sequence.

Keypad Clue Formulation:
• 1 Bullet Hole  -> Sign Value: 99
• 2 Bullet Holes -> Sign Value: 12
• 3 Bullet Holes -> Sign Value: 24
Final Gate Access Code: 991224

To determine the rest of the numbers, inspect the wooden signs uncovered from the snow. Player experience indicates that many investigators get stuck here by overthinking the sign text; the real cipher lies purely in the ballistic damage. Match the quantity of bullet holes on each sign to order the code from fewest holes to most holes.

Bullet Hole Count	Sign Identifier / Markings	Corresponding Code Segment
1 Bullet Hole	Weathered warning sign	`99`
2 Bullet Holes	Damaged directional post	`12`
3 Bullet Holes	Splintered perimeter marker	`24`

Input the combined string 991224 into the keypad. The electronic locks will disengage, swinging the gate open into the inner courtyard.

Navigating the Drone Patrol and Rescuing Murphy

Once through the security gate, Kate and Murphy are confronted by an autonomous drone patrol guarding an impassable wall of solid ice. In this section of our on thin ice walkthrough chapter 4, timing and positioning are paramount.

The drone puzzle requires players to maneuver Kate and Murphy across a tiled grid to collect five demolition markers without crossing into the red detection zones projected by the moving security drones.

Step-by-Step Drone Infiltration Strategy

Analyze Drone Flight Paths: Drones sweep back and forth along predictable vectors. Watch their cycle for two full rotations before executing your first move.
Coordinate Dual Movement: Kate and Murphy must advance without leaving either partner stranded in an active sweep cone.
Collect Perimeter Markers First: Secure the outer boundary markers before venturing into the intersecting crossfire zones in the center.
Plant Charges on the Ice Wall: Once all five demolition markers are in your inventory, Kate deploys them systematically along the structural fault lines of the frozen barrier.

Detonating the markers shatters the ice wall, uncovering the syndicate's interior cabin hideout. Head straight through the breach.

Upon entering, a sudden floor collapse separates our detectives: Murphy falls through a broken loft walkway and finds himself trapped over an icy drop. You must construct an improvised crossing before you can proceed any further into the complex.

Pull back the torn wall curtain to retrieve a sturdy claw hammer. Grab the two structural timber beams resting beside the doorway frame. Use your hammer on the damaged floorboards to extract two salvageable wooden planks.

Next, step back outside through the shattered wall. Pick up the fallen wooden sign lying in the snow, then use your claw hammer to pry off two additional exterior signs mounted to the facade. Removing these signs exposes an etched set of decorative rune markings carved directly into the exterior masonry—take careful note of these symbols for the upcoming ring puzzle.

Return inside to the broken bridge gap. Place the two support beams across the chasm, lay all five collected planks flat over the timber, insert your gathered metal spikes into the mounting points, and drive them down securely using your hammer. With the bridge fully reinforced, cross over to pull Murphy to safety.

Solving the Fireplace Mantelpiece and Ring Puzzle

After pulling Murphy up, he hands you a carved golden ring retrieved from the ledge below and points out an ornate mantle carving above the fireplace that features circular recesses. To unlock the subterranean descent into the syndicate bunker, you must find two additional matching rings.

Pick up the second ring resting inside the cold ashes of the fireplace hearth. Then, pick up the telescoping skylight rod resting directly on top of the mantelpiece. Use the extended rod to reach the high rafters above the room, snagging the third and final golden ring.

Interact with the fireplace mantelpiece to initiate the alignment lock. Insert all three rings into the circular slots.

Ring Layer	Carved Letter / Rune Target	Visual Alignment Cue
Outer Ring	Matches exterior masonry carving	Align to top apex
Middle Ring	Interlocking geometric knotwork	Center notch alignment
Inner Ring	Roman-style numerical indicators	Framed within the lower 'V' bezel

Rotate the three concentric rings until their carved motifs align precisely with the runes you uncovered beneath the exterior wooden signs outside. When aligned correctly, the open "V" cut-out on the lower bezel frames a four-digit numerical combination: 7427.

Entering this cipher shifts the internal counterweights of the fireplace, sliding the rear brickwork aside to reveal a vertical maintenance ladder heading deep underground.

Taking Down Colt and the Final Confrontation with Sticks

Climbing down the ladder brings you into the heart of the ransomware syndicate's underground communications bunker. Colt, one of the primary enforcers, is guarding the room alongside an industrial generator, while Dan's abducted daughter, Caspia, is bound in handcuffs nearby.

A frontal assault will result in immediate failure, so you must orchestrate a distraction. Community reports on tactical forums highlight this sequence as a common stumbling block for players who try to interact directly with Colt before sabotaging the compound's equipment.

Climb back up the ladder to the upper cabin room. Pick up the steel chisel from the worktable, then use the hammer and chisel together on the decorative globe display case to crack it open. Inside, retrieve a jar of thick pancake syrup and a broken glass bottle neck.

Descend back into the basement. Pour the pancake syrup directly into the fuel intake funnel of the running generator. The viscous liquid immediately gums up the engine turbines, causing the machinery to backfire violently.

As Colt rushes over in a panic to inspect the sputtering generator, sneak up behind his unattended gear bag to steal his tactical stun taser and his handheld close-quarters combat manual.

Combat Progression Flow:
Syrup in Generator -> Colt Distracted -> Steal Taser & Manual -> Subdue Colt -> Free Caspia with Key -> Confront Sticks

Equip the stun taser and use it directly on Colt while his back is turned. Search his unconscious body to recover the handcuff key, then immediately use the key on Caspia's restraints to set her free.

Just as freedom seems within reach, Sticks ambushes the group, dragging Caspia onto an interior suspended bridge and threatening to end her life. To resolve the climax of our on thin ice walkthrough chapter 4, step forward onto the bridge platform to engage Sticks in single-combat.

The final boss encounter against Sticks functions as a three-round tactical counter-attack system. Each round, Sticks adopts an aggressive stance. You must consult your combat manual to select three consecutive maneuvers that counter her specific form.

Encounter Phase	Sticks' Initial Stance	Correct Move Counter Sequence	Round Outcome
Round 1	High Overhand Strike	Low Dodge $\rightarrow$ Rib Strike $\rightarrow$ Wrist Lock	Sticks loses balance
Round 2	Low Sweeping Tackle	Backward Leap $\rightarrow$ Shin Kick $\rightarrow$ Collar Grab	Sticks' weapon is jarred loose
Round 3	Desperation Lunge	Side Pivot $\rightarrow$ Disarm Armbar $\rightarrow$ Takedown Sweep	Sticks is fully incapacitated

Executing the final takedown sweep knocks Sticks unconscious, allowing Kate and Murphy to secure the hostage and signal local police headquarters as backup arrives through the storm. For more developer updates and companion titles in the Kate Gray detective series, you can explore the Haiku Games official portal to view the entire Adventure Escape catalogue.

Expert Strategies for Adventure Escape Mysteries Puzzles

Mastering the puzzles in Adventure Escape Mysteries requires methodical environmental awareness. Player experience across the puzzle-adventure community reveals several foundational habits that make complex chapters significantly easier to complete:

Screen Edge Sweeping: Before tapping interactive puzzle elements, slowly trace the perimeter of every new room. Small inventory tools like chisels, rods, and planks often blend into cluttered backgrounds.
Transcribing Environmental Markings: Whenever you uncover etched stones, wall scratches, or bullet clusters, take an in-game screenshot or write down the pattern immediately. Most physical locks derive their solutions from symbols scattered across previous screens.
Process of Elimination in Mini-Games: On stealth maps like the Chapter 4 drone patrol, map out forbidden safe-spots where vision cones linger longest, then chart paths through the transient blind spots.

By following this on thin ice walkthrough chapter 4 guide, you have successfully dismantled the cybercrime syndicate, saved Murphy, rescued Caspia, and brought closure to one of the most perilous investigations in Kate Gray's storied career.

Frequently Asked Questions (FAQ)

What is the gate code in Chapter 4 of On Thin Ice?

The numeric code to unlock the perimeter gate in Chapter 4 is 991224. You discover this by counting the bullet holes scattered across the signs buried in the snow drifts (1 hole corresponds to 99, 2 holes correspond to 12, and 3 holes correspond to 24).

How do I distract Colt in the underground bunker?

To distract Colt, climb back up the ladder to the upper cabin room, crack open the decorative globe using the hammer and chisel, and retrieve the jar of pancake syrup. Pour the syrup into the generator's intake funnel in the basement. The engine will sputter and smoke, drawing Colt away from his backpack.

Where are all three rings for the fireplace mantelpiece puzzle?

The first ring is handed to you by Murphy after you rebuild the wooden bridge. The second ring rests inside the ashes of the fireplace hearth. The third ring hangs high up near the ceiling rafters; you must grab the skylight rod from the top of the mantelpiece to reach up and pull it down.

Why won't my moves defeat Sticks in the final Chapter 4 battle?

The fight against Sticks is not random button-mashing; it requires using the specific tactical counters outlined in the combat manual stolen from Colt's bag. You must enter a sequence of three countering actions for each round. Follow our on thin ice walkthrough chapter 4 combat table above to counter her high strikes, sweeping tackles, and lunge attacks in the correct order.