Trench Decay Wiki
Trench Decay is a brutal WW1-themed squad PvE roguelite shooter on Roblox. Hold the line against gas attacks, scavenge weapons, complete campaign missions, extract with your squad, and contribute to the server-wide LIVE WAR map.
Trench Decay Toolkit
Eight field manuals covering everything from free codes to endgame extraction routes
Latest Updates
Discover the newest guides, tips, and content
Trench Decay Best Weapon: Tier List & Loadout Rankings
Ranking the best weapons in Trench Decay, including the M1918 BAR rifle and the Demolisher burst shotgun, with mode-by-mode loadout picks.
Trench Decay Double 0: Explosive Pistol Stats & Loadout Tips
Master the Double 0 explosive pistol in Trench Decay: Skyfall update stats, damage behavior, loadout pairings, and combat tips for raids.
Trench Decay Musket: How to Unlock & Guts and Glory Comparison
How to unlock the Musket in Trench Decay, where to find it, and how it compares to the anointed Guts and Glory variant sold by the Scavenger.
Trench Decay Codes: Current Status & Official Access Channels
The current status of Trench Decay codes, where to find legitimate redeem codes, and how to avoid fake code scams.
Trench Decay Iron Maiden Challenge: Walkthrough & Rewards
How to complete the Iron Maiden Penance Challenge in Trench Decay: entry rules, the Ossuary map, surviving at 1 HP, and the golden mask reward.
Trench Decay the Konig: Search Term Explained & Guide
Is there a 'Konig' in Trench Decay? We clarify this search term and cover the real arsenal, classes, gas mechanics, and extraction loop on Roblox.
Trench Decay Farquhar Hill 1909: Weapon Guide & Loadout Tips
How the Farquhar Hill 1909 rifle works in Trench Decay: role, wave performance, best loadout pairings, and tips for holding the line and extracting.
Trench Decay MG08: Stats, Loadout Tips & Best Playstyle
Master the MG08 in Trench Decay: full stat breakdown, positioning tactics, ammo management, and how it compares to the Chauchat and Lil Timothy.
Trench Decay Xerces: Current Status & What to Check
Is there a Xerces weapon, boss, or event in Trench Decay? Here's what's confirmed, where to verify new content, and how to stay updated.
Trench Decay How to Build: Best Loadout & Class Setup Guide
Learn how to build the best loadout in Trench Decay: class roles, weapon picks per campaign phase, squad comps, and gas-survival setup tips.
Trench Decay How to Play Engineer: Fortification Setup Guide
Master the Engineer class in Trench Decay: barricade building, barbed wire placement, satchel charges, and objective defense chapter strategies.
Trench Decay How to Get Xerces Mask: Acquisition Guide
How to get the Xerces Mask in Trench Decay: verified acquisition routes, gas mask mechanics, code rewards, and official channels to confirm availability.
Trench Decay Codes
Grab all working codes for free rewards like credits and cosmetics. Redeem them in-game before they expire.
Trench Decay codes are released by Studio Rook through their official Discord server and Roblox group, usually alongside major updates or milestones. Redeeming codes is the fastest way for new players to stock up on free currency and unlock bonus items. Below you'll find every currently active code, where to enter it, and the old codes that no longer work so you don't waste time trying them.
Launch celebration reward (credits)
Redeem as soon as possible; launch codes tend to expire first.
DUAL update celebration reward
Released with the DUAL major update.
Bonus reward (currency/boost)
Community milestone code shared via the official Discord.
Studio Rook group-member reward
Join the Studio Rook Roblox group before redeeming if the code fails.
How to Redeem Trench Decay Codes
- 1Launch Trench Decay on Roblox.
- 2Click the CODES / gift icon button (usually bottom-left or in the shop menu).
- 3Type or paste the code exactly, then confirm.
- 4Your reward is applied instantly; codes are case-sensitive.
Expired Codes
Older milestone and event codes from previous updates no longer work. If a code returns 'Invalid', it has been retired — watch the official Discord for new drops.
Trench Decay Beginner Guide
Learn the core loop: gear up, hold the trench line against the decayed, and extract your loot alive. Avoid the mistakes that wipe new squads.
Trench Decay drops you into a war-torn frontline where you defend trenches against waves of infected while scavenging for loot. The core loop is squad-based: fortify your line, survive escalating gas-fueled assaults, then extract your haul. This guide walks you through your first deployment step by step and highlights the most common early mistakes to avoid.
Learn the basic controls
Before anything else, get comfortable with movement, aiming, reloading, and swapping weapons. Practice in a safe area of the map, and bind melee and grenade keys where you can reach them fast — you'll need both when enemies reach the trench.
Gear up before deploying
Spend your starting credits on a decent primary weapon and basic armor. Redeem active codes for free currency to afford better early gear. Don't hoard credits — early upgrades make your first runs much smoother.
Stick with your squad
Trench Decay is built around squad play. Stay near teammates, assign lanes (each player covers a section of the trench), and call out flanks. Lone players get surrounded and overrun quickly.
Hold the line against gas assaults
Waves intensify over time, with gas and heavier enemies pushing your defenses. Repair barricades between waves, keep ammo topped up, and fall back to chokepoints instead of fighting in the open when overwhelmed.
Extract with your loot
The goal of every run is to loot, then reach the extraction point alive. Don't get greedy — dying means losing what you carried. Know where extraction is before the final wave hits, and leave with time to spare.
Common beginner mistakes
Avoid: wandering alone, ignoring barricade repairs, spending everything on cosmetics before weapons, fighting during the gas instead of retreating to cover, and attempting extraction at the last second. Fix these and you'll outlive most new players.
Trench Decay Weapons Tier List
Every weapon ranked from S to C based on damage, fire rate, availability, and role. Pick the right gun for your playstyle and squad role.
Choosing the right weapon in Trench Decay depends on your role: holding chokepoints, clearing hordes, or dealing with armored threats. This tier list grades the weapon pool on raw damage output, fire rate, ease of acquisition, and how well each gun performs across waves and extraction runs. Use it to plan your loadout before committing hard-earned credits.
Meta Picks
2 weaponsShotgun (heavy close-range class)
- Damage
- Very high (close range)
- Fire Rate
- Slow, pump-action
- How to Get
- High-tier shop purchase / rare loot
- Best For
- Trench chokepoints and breach defense — deletes anything that gets close.
LMG / high-capacity automatic
- Damage
- High sustained
- Fire Rate
- Fast, large magazine
- How to Get
- Late-game unlock
- Best For
- Holding lanes solo during heavy waves without reloading mid-push.
Strong Contenders
3 weaponsAssault Rifle (standard automatic)
- Damage
- Solid per-shot
- Fire Rate
- Medium-fast
- How to Get
- Mid-tier shop purchase
- Best For
- All-rounder for most waves; the safest first major upgrade.
SMG
- Damage
- Low-moderate per shot
- Fire Rate
- Very fast
- How to Get
- Early-mid shop purchase
- Best For
- Mobility and flanking; great for runners and looters.
Scoped Rifle / DMR
- Damage
- High per shot
- Fire Rate
- Slow, precise
- How to Get
- Mid-tier unlock
- Best For
- Picking off priority targets before they reach the trench.
Situational Picks
2 weaponsSemi-auto Rifle
- Damage
- Moderate
- Fire Rate
- Limited by trigger speed
- How to Get
- Cheap shop purchase
- Best For
- Budget option with decent range while saving for better guns.
Revolver / heavy pistol
- Damage
- Good burst damage
- Fire Rate
- Slow, small cylinder
- How to Get
- Starter sidearm tier
- Best For
- Backup weapon; fine early, replace as soon as possible.
Starter Gear
2 weaponsStarter pistol
- Damage
- Low
- Fire Rate
- Moderate
- How to Get
- Default / free
- Best For
- Only your very first run — upgrade out of it immediately.
Melee (trench tools)
- Damage
- Situational
- Fire Rate
- Swing-based
- How to Get
- Default / unlockable
- Best For
- Ammo-saving finisher on lone enemies, not a real combat plan.
Trench Decay DUAL Update Guide
Studio Rook's biggest Trench Decay update yet: new gameplay, new weapons, map overhauls, and balance changes. Here's how to tackle it.
The DUAL update is Trench Decay's largest content drop so far, introduced by Studio Rook across their game, group, and YouTube channel. It expands the core experience with new ways to play, a broader arsenal, refreshed map areas, and a wave of balance tuning. This guide breaks the update into digestible sections and finishes with a recommended approach for returning and new players alike.
Trench Decay Classes & Loadouts Guide
A breakdown of every class role in Trench Decay and the best loadout combinations for each stage of the campaign. Build a squad that covers assault, support, and utility.
Trench Decay is a class-based co-op survival shooter where squad composition can decide whether your team holds the line or gets swallowed by the gas. Each class brings a distinct weapon profile and utility kit, and the right loadout changes as the campaign escalates from open trench fights to tight last-stand defense. This guide covers every class role, recommended loadouts per campaign phase, and team composition advice for squads of any size.
Rifleman
All-round line holder
- Reliable mid-range rifle
- High ammo efficiency
- Works in every phase
Primary: Standard-issue bolt rifle
Sidearm: Revolver
Utility: Ammo pouch + sandbag kit
Anchor the center trench while flank classes rotate around you.
Assault / Raider
Close-quarters pusher
- Shotgun and SMG options
- Excels in trench raids
- Fast objective capture
Primary: Trench shotgun
Sidearm: Semi-auto pistol
Utility: Grenades + smoke
Use smoke to cross no-man's-land, then clear dugouts at close range.
Medic
Sustain and revival
- Fast revive speed
- Heals bleed-outs
- Keeps squads fighting through long waves
Primary: Carbine
Sidearm: Pistol
Utility: Medical bag + stim syringes
Stay one trench behind the front line so you can reach downed teammates safely.
Support / Gunner
Suppression and resupply
- LMG suppression
- Resupplies team ammo
- Shreds grouped waves
Primary: Light machine gun
Sidearm: Revolver
Utility: Ammo crate + tripod
Set up at a chokepoint overlooking the objective and pre-aim enemy spawn funnels.
Engineer
Fortification and explosives
- Builds barricades and wire
- Defuses and plants charges
- Counter-armor utility
Primary: Trench carbine
Sidearm: Flare pistol
Utility: Toolbox + satchel charges
Pre-build barricades between waves; barbed wire slows flanking raiders dramatically.
Scout / Marksman
Long-range pickoff
- Long sightlines control
- Picks off specialists
- Spots incoming waves
Primary: Scoped rifle
Sidearm: Pistol
Utility: Flare gun + binoculars
Mark enemy specialists with flares so your team prioritizes high-threat targets.
Trench Decay Extraction & Live War Map Guide
How extraction works in Trench Decay, and how every successful run pushes the shared LIVE WAR map forward for the entire server community.
Extraction is the heart of Trench Decay's loop: you deploy, scavenge, fight through waves, and must reach an extraction point with your loot intact — dying means losing your haul. Everything you extract successfully contributes to the LIVE WAR map, a server-wide persistent frontline that shifts based on the collective performance of all players. This guide walks through the full extraction cycle and explains how your personal results feed the global war effort and its reward tiers.
Deploy and Scavenge
Drop into the trench sector and loot crates, supply dumps, and enemy drops. Prioritize high-value salvage over bulk low-tier loot to keep inventory space efficient.
Read the Gas Timer
Poison gas advances on a schedule each run. Watch the gas indicator and plan your scavenging route so you're never more than one trench away from a safe exit line.
Survive the Wave Push
Enemy waves intensify as the run progresses, especially near extraction windows. Hold a fortified position with your squad instead of running solo across open ground.
Reach the Extraction Point
Move to the marked extraction zone before the gas or waves overrun you. Extraction typically requires holding the zone briefly — defend the point until the timer completes.
Bank Your War Contribution
A successful extraction converts your salvage into war contribution. Extracted value is credited to your personal record and added to the server-wide frontline progress.
Track the LIVE WAR Map
The shared LIVE WAR map updates with every player's extractions and losses. As the community pushes sectors, new campaign milestones unlock and reward tiers fill for all participants.
Claim Milestone Rewards
When community progress fills a war tier, log in to claim your share of the rewards. Keep extracting consistently — sustained contribution across runs matters more than a single big haul.
Trench Decay Campaign Progression
A chapter-by-chapter breakdown of the campaign progression, enemy wave behavior, gas push mechanics, and the key hold points for each stage.
The Trench Decay campaign escalates through a series of trench-line chapters, each introducing heavier enemy waves and more aggressive gas pushes. Gas is the campaign's clock: it advances in timed surges, forcing your squad forward or into defensive positions before the sector becomes unlivable. This table lays out the recommended progression order, what to expect from enemy waves in each chapter, and how to hold each line.
Chapter 1 — First Deployment
Enemy Waves: Light infantry waves, slow trickle spawns, basic raiders
Gas Mechanic: Intro gas surges with long warnings
How to Hold: Learn the trench layout and barricade the two main funnels; save grenades for clustered groups.
Chapter 2 — The Forward Line
Enemy Waves: Mixed infantry with first specialist enemies (armored raiders)
Gas Mechanic: Periodic gas pushes that shrink the playable sector in halves
How to Hold: Assign one player to watch each flank; fall back tier-by-tier instead of retreating all at once.
Chapter 3 — No Man's Land
Enemy Waves: Open-field charges plus flanking parties through side trenches
Gas Mechanic: Directional gas drifting from the enemy side — watch wind indicators
How to Hold: Use barbed wire and sandbags in open ground; Scouts should call flanks early.
Chapter 4 — The Strongpoint
Enemy Waves: Sustained siege waves with shielded and heavy units
Gas Mechanic: Gas follows every failed assault — expect a surge after each big wave
How to Hold: Concentrate LMG and Engineer firepower at the strongpoint choke; medics stay in the rear dugout.
Chapter 5 — The Breakthrough
Enemy Waves: Fast shock waves, mixed with rear infiltrators hitting your extraction route
Gas Mechanic: Rapid gas timers — nearly continuous pressure
How to Hold: Keep the extraction corridor barricaded from the start; rotate fresh defenders onto the corridor every wave.
Chapter 6 — Final Stand
Enemy Waves: Endless-style overwhelming waves with all specialist types
Gas Mechanic: Final total gas advance — the map shrinks to a last defensible pocket
How to Hold: Stack ammo crates pre-wave, hold a circular defense with overlapping fire lanes, and extract the moment the final timer allows.
Trench Decay Tips & Tricks
Field-tested tips covering resource management, squad roles, terrain abuse, and gas dodging — everything that separates fresh recruits from veteran survivors.
The gap between a wiped squad and a full extraction usually comes down to fundamentals: ammo discipline, terrain usage, clean gas timing, and knowing your job in the team. These cards collect the practical tricks experienced Trench Decay players use to push deeper into sectors and bring the haul home. Read them before your next deployment.
Never Loot Past Your Exit Window
Track the gas timer against your distance to extraction. If the gas can reach your exit trench before you can, you've already looted too deep — start pulling back one trench early every run.
One Ammo Crate, Whole Squad
Support ammo crates refill the entire team. Stack the squad on one crate during wave lulls instead of everyone carrying spare magazines — it frees inventory for salvage.
Assign Lanes, Not Positions
Give each player a firing lane (left trench, center, right flank) rather than a fixed spot. Lanes keep coverage intact when someone has to fall back, revive, or resupply.
Revive in Pairs
One player covers while the medic revives. Solo revives during a wave are how squads snowball from one down into a full wipe.
Fight From the Trench Elbow
Corner junctions in trenches give you cover on two sides and a single approach to watch. Set up LMGs and Engineers at elbows and let enemies funnel into your fire.
Wire the Flank Routes
Flanking raiders use the same side trenches every map. Barbed wire on those routes buys your team seconds of warning and slows the flank to a crawl.
Move on the Surge, Not Before
Gas advances in surges with warning windows. Retreat right as a surge starts — retreating early wastes loot time, retreating late costs your run.
Memorize the Safe Pockets
Each sector has dugouts and bunkers that stay out of the gas longest. Learn them in low-risk runs so late-campaign retreats are muscle memory, not guesswork.
Defend the Zone, Don't Sprint It
Extraction requires holding the zone for a short timer. Arrive as a squad, set up facing the enemy spawn funnels, and defend the hold — sprinting in solo just gets you caught alone.