Roll Your Army Update 4 (UPD 4)

Update 4 — tagged [UPD 4] on the official Roblox experience page — is the current headline patch for Roll Your Army by Base Guardians! The live game description promotes shop code UPDATE4 alongside the core loop: roll troops, place defenders, kill Brainrot waves, equip Brainrots for money, buy Lucky Blocks, and expand the Skill Tree. This page summarizes what UPD 4 means for your account, how to redeem the code, and which systems to retest after logging in on patch day.

This wiki is unofficial. Always confirm rewards in-game after redemption and watch the Roblox page plus Discord for corrections.

UPDATE4 promo code

The Roblox description explicitly states: Use code “UPDATE4” in shop!

Code	Reward	Status
UPDATE4	Free Brainrots	Active (UPD 4)
UPDATE3	Free Brainrots	May still work — try if UPDATE4 already redeemed

Redemption steps

1. Open Roll Your Army and wait for full load.
2. Tap Shop on the HUD.
3. Scroll to the Codes section.
4. Type UPDATE4 exactly — codes are case-sensitive.
5. Press Redeem and confirm inventory or popup message.

Full troubleshooting lives on the codes page. If redemption fails, rejoin the server, verify spelling, and try the newest UPDATE code before assuming expiration.

Video guide

What UPD 4 represents

Numbered updates in Roll Your Army typically bundle:

• Title tag refresh — [UPD 4] on Roblox search and experience list
• Promo code rotation — UPDATE-style codes granting free Brainrots for economy jumps
• Balance passes — troop damage, Brainrot income, wave health, or Skill Tree costs
• Content additions — new rarity bands or shop items without always listing every name publicly
• Bug fixes — placement glitches, Auto Roll stalls, UI freezes after long sessions

Base Guardians! targets Saturday releases per the official description. Treat UPD 4 as the starting point for this week’s meta until UPD 5 replaces the title tag.

Confirmed official messaging (Roblox page)

From the live experience description at patch time:

• Every roll makes your army stronger
• Roll troops and place them to defend your base
• Kill Brainrots and equip Brainrots for passive money
• Buy Lucky Blocks to boost luck
• Expand Skill Tree for powerful upgrades
• Unlock new troops and strengthen your base
• Updates every Saturday

UPD 4 does not change the fundamental loop — it refreshes rewards and tuning inside that loop. Your checklist focuses on rediscovering numbers, not learning controls from scratch.

Post-UPD 4 checklist

Run these steps in order the first time you log in after the patch:

1. Redeem UPDATE4 before farming or rolling — free Brainrots accelerate everything else.
2. Read patch chatter on Discord for hotfixes not yet in the Roblox description.
3. Replay waves 1–5 with your existing layout — note leak sides and time-to-clear changes.
4. Open Skill Tree — confirm node costs and descriptions match your muscle memory from the Skill Tree guide.
5. Check Shop prices for Lucky Blocks or boosts — run the Luck Planner if costs shifted.
6. Compare inventory bands on troops and Brainrots tier lists before mass-selling Epics.
7. Revisit base layout using base defense if wave scaling increased.

Skipping redemption step wastes the patch’s most visible player reward.

Economy impact of free Brainrots

UPDATE4 Brainrots usually land in mid rarity bands but still beat empty equip slots:

• Equip immediately on open slots — see Brainrot income guide
• Replace when rolled upgrades strictly beat them on the Brainrots tier list
• Sell duplicates only after higher bands cover each income role
• Fund Luck I and Auto Roll if not already owned

Code rewards stack with liking the game, joining the Base Guardians group, and friend luck when those bonuses are active.

Combat and roster impact

UPD 4 may adjust troop stats or wave modifiers even when no public name list ships:

• Retest choke-point melee and backline ranged — troops roster
• Do not demote Legendary anchors until they fail live waves, not theory
• Watch for new rarity colors in roll results — update personal notes against tier bands

If clears feel harder despite same layout, wave health may have risen — read beat Brainrot waves for leak fixes before blaming luck.

What to avoid on patch day

• Mass-selling duplicates before running five test waves
• External scripts promising instant rolls — see scripts hub for ban risks especially after anti-cheat tweaks
• Unofficial code sites with fake UPDATE5 strings — trust Roblox description and Discord first
• Ignoring older guides — mechanics stay, numbers move; refresh tier pages instead of restarting account

Looking ahead to the next Saturday

When [UPD 5] or the next tag appears:

• Redeem the newest UPDATE code immediately
• Archive UPDATE4 notes here for history but prioritize fresh code on codes page
• Return to Updates hub for the next featured page

Related resources

• Updates hub — all patch notes
• Codes page — working and expired codes
• Getting Started — loop refresher for returning players
• Official links — Roblox, Discord, Base Guardians group

UPD 4 is live when the Roblox title shows [UPD 4] and UPDATE4 redeems successfully. Claim the code, run the checklist, then push your base into the new week’s meta.