Undertale Adventures X Raid Act 1 Guide: Best Teams, Rewards, and Clear Tips

A practical walkthrough of the Undertale Adventures X Raid Act 1 mode, covering prep, unit roles, strategy, rewards, and the codes worth redeeming.

Raids are the moment Undertale Adventures X stops being a relaxed chapter grind and starts asking whether your squad can actually hold a lane under pressure. If you've been cruising through early story maps and you're now staring at the Undertale Adventures X Raid Act 1 gate, you've hit the game's first real difficulty wall — and the units that carried you this far may not be enough on their own.

This guide breaks down what the Undertale Adventures X Raid Act 1 mode expects from you, how to prepare without wasting Souls, which unit roles matter most, and the mistakes that send most first attempts straight back to the lobby. Everything here is aimed at players who want a clean clear rather than a lucky one.

What Is the Undertale Adventures X Raid Act 1 Mode?

Undertale Adventures X is an Undertale-inspired Roblox tower defense game from Side Productions, and raids sit alongside its story chapters as a separate, tougher progression track. Where a chapter is usually a straight run through a fixed set of waves, a raid compresses that pressure into a shorter, meaner fight that punishes weak placement and half-finished teams.

The Undertale Adventures X Raid Act 1 encounter is the entry tier of that track. In practice, that makes it the raid you're expected to clear with a solid but not perfect roster — the gate that teaches raid habits before later acts start layering on extra pressure. Because raid balance gets adjusted regularly, treat any specific numbers you see in a video as a snapshot rather than gospel. The fundamentals below hold across patches.

Feature	Story chapters	Raid Act 1 (raid tier)
Unit investment needed	Low to moderate	Moderate — upgraded, not just summoned
Failure cost	Retry freely	A wasted run and a full team reset
Coordination	Optional	Strongly recommended
Enemy pressure	Ramps gently	Spikes fast, with a boss-style finish
Rewards	Story progression and Souls	Raid-tier rewards and progression
Best entry point	Start of the game	After a stable chapter roster

Why Act 1 matters more than it looks

Act 1 is where you learn the habits that carry you through every later raid: economy discipline, upgrade timing, and target priority. Players who brute-force it with an over-leveled roster often hit a wall two acts later, because they never learned to manage a run. Clear it properly once and the rest of the raid track gets noticeably easier.

How to Prepare for Undertale Adventures X Raid Act 1

Prep is where most clears are actually won. Before you queue, three systems matter: Souls (the summoning currency), trait rerolls (your stat upgrades), and codes (free injections of both).

Souls and summoning

Soul Fragments combine into Souls, and Souls are what you spend to summon units. Arriving at a raid with an empty Soul bank means you have no way to pivot if your first composition fails. Player experience consistently suggests banking enough for at least one or two emergency summons before you start a serious attempt.

Trait rerolls

Rerolls are spent in the upgrades area to buff your team's stats. The most common mistake here is spreading them thin across the whole roster. Concentrate them on the two or three units that will actually anchor your raid lane — a single heavily upgraded carry outperforms six mediocre ones.

Codes: free Souls and rerolls before you queue

Codes are the fastest way to top up your bank before an attempt. To redeem one, click the Codes button on the right-hand side of the main lobby screen, type the code into the box, then press Enter on PC, A on Xbox, or X on PlayStation. On mobile, simply tap outside the code box.

Code	Reward	Status
MOREFREESTUFF	25x Trait Rerolls, 3 Gaster Hands, 1,000x Souls	Active
THANKYOUFORWAITING	—	Expired
2KCCU!	—	Expired
FREESTUFF!	—	Expired
TRADINGSOON!	—	Expired
MONEYTONIGHT	—	Expired

Codes in this game have a habit of dying within hours, so redeem anything working the moment you see it. For a live list that gets refreshed as new codes drop, bookmark GamesRadar's updated Undertale Adventures X codes list and check it before each session.

Prep step	Priority	Why it matters
Bank Souls for emergency summons	High	Lets you adapt mid-raid instead of restarting
Concentrate rerolls on 2–3 core units	High	Turns a good unit into a raid carrier
Redeem all working codes	High	Free Souls and rerolls cost you nothing
Upgrade your lane anchors	Medium	Raw stats beat extra bodies in later waves
Test your comp in a chapter first	Medium	Confirms placement before a real attempt

Best Unit Roles for Undertale Adventures X Raid Act 1

Raid compositions are less about collecting every recognizable Undertale character and more about covering jobs. A team that covers all five roles below will usually outperform a team of five high-rarity damage dealers.

Role	Job in the raid	What to prioritize
Lane anchor / DPS	Holds the main path	High single-target damage and solid range
AoE clear	Deletes grouped waves	Wide splash and fast attack speed
Support / buffer	Lifts nearby units	Damage or speed buffs, cheap to place
Economy / farm	Generates currency mid-run	Early placement in a safe back-line spot
Boss finisher	Bursts the final threat	High burst damage and a short cooldown

A reliable starting shape is one economy unit, two anchors, one AoE unit, and one support or finisher. If your roster is thin, cut the support first — economy and anchors are non-negotiable, because they're what let you keep scaling as waves get heavier.

Placement beats rarity

Where a unit sits matters more than how rare it is. Anchors should cover the longest stretch of path available, AoE units should sit where enemies bunch up, and economy units belong at the back where nothing reaches them. Spend the first few waves watching how enemies move before you commit your layout.

Undertale Adventures X Raid Act 1 Strategy and Common Mistakes

The core raid loop is simple: place a minimal opener, upgrade before you expand, and re-balance lanes whenever damage is landing where enemies aren't. Most failed attempts come down to one of six habits.

Mistake	Why it hurts	Fix
Placing everything at the start	You run dry and can't afford upgrades	Open small, upgrade, then expand
Spreading rerolls across the roster	No unit becomes strong enough to matter	Stack rerolls on 2–3 core units
Skipping economy units	Late waves simply overwhelm you	Slot one farm unit in a safe spot
Upgrading the wrong lane	Damage lands where nothing walks	Re-check the path every few waves
Queuing with an empty Soul bank	Zero flexibility after a failed attempt	Bank Souls before starting
Redeeming codes too late	Free rewards expire unused	Redeem immediately when a code is live

Ability timing and the final push

Save your biggest abilities for the closing waves rather than firing them the moment they're ready. The last stretch of a raid is usually where the boss-style threat appears, and an ability that's already on cooldown when it arrives is an ability you wasted. If you're unsure, hold one burst ability in reserve specifically for the finish.

Rewards and Progression After Clearing Act 1

Community reports suggest that clearing the Undertale Adventures X Raid Act 1 tier feeds you into the next stage of the raid track, so the goal isn't to farm it forever — it's to clear it and move on.

Reward type	What it does	Best use
Souls and Soul Fragments	Fuel for summoning units	Bank toward a targeted summon
Trait rerolls	Stat buffs in the upgrades area	Concentrate on your core units
Special items	Rare drops and code rewards	Hold until your roster needs them
Raid progression	Unlocks the next raid act	Push forward before re-farming

Once you've cleared it, run Act 1 again only when you need a specific drop or want to test a new composition cheaply. The real value is the habit you build: bank before you queue, upgrade before you expand, and hold your burst for the finish.

FAQ

Do I need a full team to clear Undertale Adventures X Raid Act 1?

No, but you need a balanced one. Five units covering economy, anchoring, AoE, and burst will clear far more reliably than a stacked roster of pure damage dealers. If you're short on units, prioritize economy and lane anchors.

How many units should I place before upgrading?

Open with as few as your economy allows, then upgrade before adding more. Raid waves scale faster than early placements do, so an upgraded core usually beats a wide, weak spread.

Are codes worth using for raid prep?

Yes — they're free Souls and rerolls with no downside. Redeem every working code before you queue, and check a maintained list regularly, since some codes expire within hours of release.

What should I do after clearing Raid Act 1?

Move into the next raid act while your team is tuned, and only re-farm Act 1 when you need a specific reward. Keep banking Souls and rerolls so you're never entering a raid with an empty reserve.