Follow the case marker, then equip the reward

Hard Cases and secondary objectives unlock campaign mods and slots. Equip them at a Supply Cache.[10]

Weapon Mods tutorial: unlocks from Hard Cases and secondary objectives
Weapon Mods tutorial. Screenshot: Mach Speed / Qualbert.[10]

Nearby notifications, Tac-Com and district-map markers help locate cases. A marker can appear before its approach becomes accessible.[2][11]

Kalona district map with the southeast Amberstone yard case marker selected
Act 2 district map at the Amberstone yard case. Screenshot: Adam Stewart / Gamer Social Club; captured from review gameplay.[2]

Act 2 checklist · 36 cases

Numbers below restart within each stage and identify this route’s rows; they are not official item IDs. Check each container after opening it. Hold the Line contributes 1 + 18 + 8 cases, followed by six in No Gear Left Behind and three in Overrun.[2]

0 / 1 completed

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Hold the Line · Part 1 · 1 case[2]
DoneCaseLandmark / approach
1Burnt bus: junction’s right branch.
0 / 18 completed

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Hold the Line · Part 2 · 18 cases[2]
DoneCaseLandmark / approach
1Construction site: upper floor.
2Major Burger car park: top.
3Canal path below bridge.
4Yard south of Amberstone.
5Southern district alley: map.
6Roadblock ladders → window room.
7Kalona Times: upper floor.
8Newspaper kiosk.
9Crashed truck: enemy ambush.
10Eastern construction stairs → road, left.
11Pharmacy opposite previous case.
12Opposite construction: container → upper room.
13Muster-point loading-dock alley.
14Muster-point building: right-hand pillars.
15Amberstone: main objective route.
16Riverside underground car park.
17Bank vault: right side.
18Charlie camp: right-hand table.
0 / 8 completed

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Hold the Line · Part 3 · 8 cases[2]
DoneCaseLandmark / approach
1Military camp: shipping container.
2Monroe Library park: back left.
3Kalona Hotel entrance: right.
4Opposite hotel: rope → balcony.
5Whiskey Squad search-area alley.
6Behind police car.
7Fountain courtyard: left.
8After hotel: street car, right.
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No Gear Left Behind · 6 cases[2]
DoneCaseLandmark / approach
1Traffic tunnel: central barricade.
2Tunnel exit incline: right.
3Golden statue plaza: right corner.
4Right-hand scaffolding → container.
5Scaffolding drop: objective path, right.
6Captain Gray walk: building, left.
0 / 3 completed

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Overrun · 3 cases[2]
DoneCaseLandmark / approach
1Warehouse exit breach: right.
2Red crater: bottom.
3Final hangar: by the cache.

Game8 reports an Armor Mod Slot in the Amberstone case beside the stairs during Secure the Imulsion stockpile: Hold the Line, Part 2, row 15 above.[13]

Act 3 checklist · 38 cases

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Stranded · 3 cases[14]
DoneCaseLandmark
1Crashed Raven: left.
2Fairlight: red containers.
3Substation: left corner.
0 / 8 completed

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Enemy Lines · 8 cases[3]
DoneCaseLandmark
1Beyond Gnasher room: right.
2Upper subway: planks, right.
3Station cache: left.
4Train crossing: left divider.
5Beyond crossing: right.
6Fallen statue: descend left.
7Right turn: left cliff.
8Beside sewer cache.
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Last Foothold · 12 cases[3]
DoneCaseLandmark
1Theater: subway-side pool hall.
2Skytrain building exit: left.
3Beyond bus: left wall.
4Library briefing: rear left.
5Hospital entrance roof.
6Hospital road: opposite cache.
7Library parking: rear left.
8Police crossroads: skytrain platform.
9Library supermarket: backroom.
10Hotel pharmacy: through windows.
11Under friendly roadblock.
12Hotel interior: left sandbags.
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The Convoy · 5 cases[14]
DoneCaseLandmark
1Courtyard: rear right.
2Bridge: under truck.
3Before drop: left barricade.
4Before rope: roadside crates.
5Control room: left.
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Desperate Times · 5 cases[14]
DoneCaseLandmark
1Beer/couch room: right.
2Outdoor fight: left fence.
3Wretch room: left crawlspace.
4Reaver courtyard: left fence.
5Torque Bow: before bridge, right.
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Desperate Measures · 5 cases[14]
DoneCaseLandmark
1Fort: left stairs.
2Upper steps: left walkway.
3Entrance: left barrier.
4Past flag: left ledge.
5Gift shop: upper left balcony.
Opened yellow case beside the left-wall sandbags inside Kalona Hotel
Last Foothold case 12: hotel interior. Screenshot: Adam Stewart / Gamer Social Club.[3]

Act 4 · partial

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Recorded cases[4][5][8]
DoneChapterLandmarkReward
Critical FailureTIMGAD reception · Left of counterPack Mule · Armor Mod
Tough as NailsWarehouse side room · Metal door / shelvingRicochet Ammo · Striga Mod
Hope and RuinHotel Regalia · pillarEspacio de mod general · Estabilizador de ráfagas (Lancer MK1)

Pack Mule

Opened case; Pack Mule reward
GOWSeriesVideos · 1:53:59[4]

Act 4.3 · Warehouse Hard Case

Open the metal door by the warehouse shelves. Clear Wretches, then empty the windowed room’s case.[5]

Act 4.1 · hotel case

Inside Hotel Regalia, look beside the ornate pillar and luggage trolley.[8]

Act 5 · partial

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Recorded cases[6][7]
DoneChapterLandmarkReward
One Problem at a TimeRail yard fenceArmazón de esqueleto · Ripper LMG mod
Ghost TownFenced sedanKill Credit · Armor Mod
Ghost TownBurning wreckageVolatility Amplifier · Injector Mod
Ghost TownRooftop ductName not displayed

Act 5.1 · rail yard Hard Case

Open the yellow case against the wire fence beside the rails.[6]

Reward label stays Spanish; its English localization is unverified.

Act 5.2 · two Ghost Town cases

One case sits beside a damaged sedan and wire fence; the other lies against the brick wall beside burning wreckage.[7]

Act 5.2 · rooftop case

Check the corrugated rooftop wall beside the curved duct.[7]

Two approaches worth slowing down for

  1. Window room: climb the roadblock-side ladders, break the window, enter.
  2. Bank vault: case on the right; lore collectible on the left.[2][15]
Yellow Hard Case in the upstairs apartment kitchen reached through the roadblock-side window
The window-room case is inside the kitchen. Screenshot: Adam Stewart / Gamer Social Club; this is Hold the Line Part 2, case 6 in the route above.[2]

Finish the current district sweep before the Charlie Squad transition or entering Kalona Hotel. The illustrated route identifies these as transitions that close earlier exploration.[15]

Use the overall tally when replaying

Gamer Social Club’s completed campaign review reports that Hard Cases and secondary objectives are tracked by Act, while replaying a chapter resets its local discoveries. The overall completion tally remains. Keep a separate location checklist when filling a short Act count.[11]

For co-op, the September 30 launch update says players joining an existing campaign lobby receive earlier Hard Case and secondary-objective progress, including War Journal and Forge rewards.[16]

Coverage beyond Acts 2–3

What this route establishes[1][2][3]
ScopeLocations checked hereCompletion boundary
Act 236Full illustrated case route enumerated.
Act 338Six chapter checklists enumerated.
Act 43Recorded warehouse, refinery and Regalia cases.
Act 54Recorded rail yard and Ghost Town cases.
Rest of campaign44 outside this checklistIndividual routes not verified here.
Standard collectiblesSeparate 140-item checklistOpen collectible routes

These checklists account for 81 of the reported 125 cases. Use the War Journal’s Act totals to identify the remaining search area; the campaign-wide achievement still needs the remaining routes.[9][11]

Sources & further reading

  1. First-hand campaign report: four separate completion totalsVGC · Chris Scullion · October 1, 2026
  2. Act 2 collectibles, Hard Cases and secondary objectives with gameplay screenshotsGamer Social Club · Adam “Addy” Stewart · October 1, 2026
  3. Firsthand Act 3 collectibles, Hard Cases and secondary objectivesGamer Social Club · Adam “Addy” Stewart · October 2, 2026
  4. Act 4 campaign walkthrough: independently recorded PC gameplayGOWSeriesVideos · October 1, 2026
  5. Complete E-Day campaign: original PC gameplay recordingHegsbroGaming · 2026-10-02
  6. Act 5 recorded case and cachesEMK KrAuSeR · 2026-10-02
  7. Act 5 recorded Hard Case openingsGOWSeriesVideos · 2026-10-01
  8. Recorded Act 4 routesElGamer WICHO! · 2026-10-03
  9. E-Day official achievements list (campaign hints)Xbox Wire · September 9, 2026
  10. Campaign loadout observations and in-game Supply Cache / Weapon Mods tutorial screenshotsQualbert · Mach Speed · October 1, 2026
  11. First-hand campaign review: Act-level Hard Case / secondary objective tracking and chapter replayGamer Social Club · Adam “Addy” Stewart · October 1, 2026
  12. Act 2 collectibles, Hard Cases and secondary objectives: companion gameplay videoOhNoNotAddy · Adam Stewart · October 1, 2026
  13. Hold the Line chapter guide: reported gear pickupsGame8 · Gears of War: E-Day Walkthrough Team · October 3, 2026
  14. Act 3 Hard Cases and secondary objectives: companion gameplay videoOhNoNotAddy · Adam Stewart · October 2, 2026
  15. Act 2 gameplay screenshot routes, including Supply Cache locationsPatch Crazy · Harry Smith · October 2, 2026
  16. Emergence Begins: Season 1, launch changes and known issuesThe Coalition · September 30, 2026