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Hell Let Loose
Hell Let Loose
Sep 4, 2026
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U21 Experimental Branch is LIVE

3/5 Moderate

EXPERIMENTALUpdate 21 introduces five new weapons including the M1903A3 Springfield and ROKS 2 Flamethrower, alongside a new Conquest game mode and fire-mode selectors for historical weapons.

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Key Changes

  • 1Five new weapons added including the M1903A3 Springfield and ROKS 2 Flamethrower
  • 2New Rifle Grenade weapon type with Frag, Smoke, and AT variants for multiple roles
  • 3Fire-mode selectors implemented for 11 historical weapons including the MG34 and STG 44
  • 4New Conquest game mode introduced for experimental testing
  • 5Major loadout overhauls for US Rifleman, Tank Commander, and Anti-tank roles
  • 6SPA gunner seats received an additional zoom level and auto-respawn mechanic
  • 7Technician wrench can now be used to build resource nodes
  • 8Blowtorch added to all default Crewman loadouts for improved vehicle maintenance

All Changes

🔫Weapons(22)

  • newM1903A3 Springfield: Added the M1903A3 Springfield for US forces
  • newROKS 2 Flamethrower: Added the ROKS 2 Flamethrower for Soviet forces
  • newM7 Grenade Launcher: Added the M7 Grenade Launcher for the M1 Garand (US)
  • newSchiessbecher Grenade Launcher: Added the Schiessbecher Grenade Launcher for the Karabiner 98k (Germany)
  • newNo.1 MK I Cup Discharger: Added the No.1 MK I Cup Discharger Grenade Launcher for the SMLE No.1 MK III EY (Britain and Canada)
  • newRifle Grenades: Introduced Rifle Grenades as a new weapon type that can swap between regular fire and launcher modes
  • newRifle Grenades: Added a radial wheel and quick-swap functionality for selecting grenade types
  • newFrag Rifle Grenade: Added Frag rifle grenades with standard explosion radius
  • newSmoke Rifle Grenade: Added Smoke rifle grenades
  • newAT Rifle Grenade: Added AT rifle grenades capable of penetrating light armor and damaging tank tracks
  • newFire Selector: Implemented fire-mode selection functionality for historically accurate weapons
  • changeMG34: Added fire-mode selection to the MG34
  • changeFG42: Added fire-mode selection to the FG42
  • changeSTG 44: Added fire-mode selection to the STG 44
  • changeBAR: Added fast and slow auto fire-mode selection to the BAR
  • changeThompson M1: Added fire-mode selection to the Thompson M1
  • changeThompson M1928a1: Added fire-mode selection to the Thompson M1928a1
  • changeBren Gun: Added fire-mode selection to the Bren Gun
  • changeSten Gun MK2: Added fire-mode selection to the Sten Gun MK2
  • changeSten Gun MK2 (Canadian): Added fire-mode selection to the Sten Gun MK2 (Canadian)
  • changeSten Gun Mk5: Added fire-mode selection to the Sten Gun Mk5
  • changePPSH 41: Added fire-mode selection to the PPSH 41

🎒Loadouts(9)

  • newRifleman: Added Level 8 Rifleman loadout featuring a Rifle Grenade with 4 Frag and 2 Smoke grenades
  • newMedic: Added Level 6 Medic loadout featuring a Rifle Grenade with 6 Smoke grenades
  • newEngineer: Added Level 8 Engineer loadout featuring a Rifle Grenade with 3 AT, 2 Frag, and 1 Smoke grenade
  • newUS Rifleman: Added Level 6 'Marksman' loadout for US Rifleman equipped with M1903A3 Springfield and explosive ammo box
  • changeUS Tank Commander: Changed US Tank Commander default weapon from Thompson to M3 Grease Gun
  • buffCrewman: Added blowtorch equipment to all default Crewman loadouts
  • buffTechnician Wrench: Added the ability to build nodes using the Technician wrench
  • changeUS Anti-tank: Changed default US Anti-tank primary weapon from M1 Garand to M1 Carbine
  • changeUS Operator: Changed US Operator default primary weapon to the Springfield M1903A3

🚜Vehicles(2)

  • buffSPA: Added a single additional zoom level to all SPA gunner seats
  • buffSPA: Default SPA vehicles spawning in HQ now auto-respawn 7 minutes and 30 seconds after destruction

🎮Game Modes(1)

  • newConquest: Introduced the Conquest game mode for testing

Summary

Update 21 Experimental Branch

This experimental playtest introduces a significant amount of new content for Hell Let Loose, focusing on expanding the arsenal and refining historical accuracy. Players can now test five new weapons, including faction-specific rifle grenade launchers and the Soviet ROKS 2 Flamethrower.

Gameplay Systems

A major addition is the Fire Selector system, allowing players to toggle between firing modes on 11 different weapons. Additionally, the new Rifle Grenade system introduces a versatile weapon type capable of firing Frag, Smoke, and AT rounds. The update also features a new Conquest game mode and various loadout adjustments across multiple roles, particularly for US forces.

Armor and Vehicles

Self-Propelled Artillery (SPA) receives quality-of-life improvements with additional zoom levels and a new auto-respawn mechanic for HQ-spawned vehicles to ensure consistent availability.

← OlderDev Brief #220 | What's Coming Next to Hell Let Loose?Sep 1, 2026

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