Undertale Adventures X: How to Beat Neutral Corridor Act 1 (Full Team & Strategy Guide)

Learn how to beat Neutral Corridor Act 1 in Undertale Adventures X with Mettaton NEO leader buffs, Knight Knight DPS, Woshua soak, and leak control.

Why Neutral Corridor Act 1 Is a Range Check, Not a Damage Check

Neutral Corridor Act 1 — the Judgement Hall stretch of Undertale Adventures X — is where a lot of promising runs quietly fall apart. The lane is long, the waves keep coming, and Sans punishes any setup that can't reach him before he reaches your base. If you've been searching for how to beat Neutral Corridor Act 1 in Undertale Adventures X, the short answer is range, status effects, and one dedicated fallback unit.

Most Roblox tower-defense stages reward you for stacking raw damage behind a choke point. This one doesn't. Because enemies travel a long, mostly straight hallway, the units that actually win are the ones that start hitting early and never stop hitting as the wave advances. A short-range nuker with enormous numbers will delete the first few enemies it touches and then stand there doing nothing while the rest of the wave walks past.

That single quirk explains almost every failed attempt. Community reports from players who've cleared Judgement Hall consistently rank range and attack uptime above raw single-target damage, which is why the recommended team leans so heavily on one specific leader skill.

Stage Demand	Why It Matters	What to Prioritize
Long corridor lane	Enemies spend more time walking than fighting	Range and total coverage
Constant wave pressure	Slow clears stack enemies at your choke point	Attack speed / cooldown reduction
Sans as the act boss	He is the primary obstacle of the stage	Debuffs (soak) plus sustained DPS
Fast or tanky stragglers	Some enemies slip past the frontline	A dedicated backline cleanup unit

In short: Neutral Corridor Act 1 is a coverage test first and a damage test second. Build for the hallway, not for the biggest numbers on the roster.

Best Team Composition for Neutral Corridor Act 1

The community-tested core is small: one leader that stretches your reach, one heavy damage dealer that benefits from it, one debuffer for Sans, one backline cleaner, and enough economy to pay for upgrades. Everything else is flex.

Unit	Primary Role	Why It Earns a Slot
Mettaton NEO	Leader / Buffer	Passive critical hit buff; leader skill massively extends range and telegraph size for qualifying units
Knight Knight	Main DPS	Fits the leader profile directly, converting the range buff into heavy damage down the hall
Woshua	Debuffer	Applies soak to Sans, which player runs identify as essential to bringing him down
Muffet	Backline Defense	Channeled bone attacks delete anything that leaks past your frontline
Money Units	Economy	Generate the currency you need for placements and high-tier upgrades

Mettaton NEO: The Leader Slot

Mettaton NEO does two jobs at once. Passively, it supplies a critical hit buff that quietly raises your whole team's output. Actively, its leader skill targets units in the CORE category that carry an explosive secondary type and grants them a dramatic boost to reach and area coverage. Without that aura running, the stage becomes a slog; with it, Knight Knight can cover a huge stretch of the corridor.

Knight Knight: The Damage Slot

Knight Knight is the natural partner because it matches the leader skill's targeting requirements exactly. Every point of range and telegraph size Mettaton NEO hands out is converted into more enemies hit per swing. If you're wondering how to beat Neutral Corridor Act 1 without overcomplicating your roster, this pair is the answer most players arrive at.

Woshua, Muffet, and the Flex Slots

Woshua exists for one reason: soak. Muffet exists for the opposite reason: insurance. Fast-moving or unusually tough enemies can push through even a well-placed frontline, and Muffet's backline bone attacks catch those stragglers before they breach your base. Round the team out with economy units so you can actually afford the upgrades that make the DPS slot scary.

The Leader Buff, Broken Down

Buff	Effect	Why It Matters Here
+50% range	Extends how far qualifying units reach	Covers massive stretches of the hall before enemies advance
+25% telegraph size	Widens the area each attack affects	Hits more of a wave per attack cycle
Reduced SBA cooldown	Fewer seconds between attacks	Higher DPS uptime across the whole act
Critical hit buff	Passive crit boost for the team	Raises overall damage without extra investment

How to Beat Neutral Corridor Act 1: Step-by-Step

The order in which you place and upgrade units matters almost as much as which units you bring. Here's the sequence community clears tend to follow.

Step	Action	Why It Works
1	Place money units first	Cash flow has to exist before you can afford upgrades
2	Set Mettaton NEO as leader immediately	The aura only helps if it's active for the whole run
3	Position your DPS inside the leader's range envelope	Range buffs are wasted on units standing outside them
4	Bring Woshua in before the boss phase	Soak needs to be applied and reapplied, not saved for a panic
5	Push DPS units to high-tier upgrades	Later waves out-scale a cheap, un-upgraded frontline
6	Hold Muffet until leaks appear	Backline defense is wasted money if nothing gets through

A few practical notes that apply to nearly every run:

Build along the center track. The corridor's straight geometry means centered placements maximize how much of the lane each unit covers.
Treat upgrades as damage-per-second insurance. A single high-tier DPS unit usually outperforms two mid-tier ones on this map.
Don't over-invest in defense early. Neutral Corridor Act 1 punishes slow clears far more than it punishes a fragile back line.

One honest caveat: exact wave counts, enemy health pools, and precise tile coordinates aren't documented in official materials or available run footage. Players should treat any specific placement claim as player experience rather than gospel, and adjust along the center lane as needed.

Sans, Soak, and Leak Management

Sans is the reason this act has a reputation. He's the primary obstacle, and he's the reason Woshua is on so many recommended teams — soak is the debuff that makes him reliably killable instead of a coin flip.

Threat	Counter	Notes
Sans (act boss)	Woshua's soak debuff	Community run footage treats soak as a mandatory step, not a bonus
Fast-moving enemies	Muffet's channeled bone attacks	Catches anything that slips past the main choke point
Tough late-wave targets	High-tier upgrades on Knight Knight	Sustained damage matters more than burst once waves thicken
Running out of currency	Early money unit placement	Economy placed late is economy you never get to spend

The economy point deserves emphasis. Players who skip money units to buy one more damage dealer usually hit a wall two or three waves later, when upgrade costs outrun their income. The fix is boring but effective: place economy early, upgrade your DPS in tiers, and let Mettaton NEO's buff do the heavy lifting on coverage.

Common Mistakes, Economy, and Optional Boosts

Most failed runs come down to a handful of repeatable errors.

Mistake	Why It Costs You	The Fix
Using Mettaton NEO as a pure damage unit	You lose the leader aura entirely	Always run it in the leader slot
Ignoring soak on Sans	The boss fight becomes a war of attrition you lose	Deploy Woshua before the boss phase
No backline unit	One leak ends an otherwise clean run	Keep Muffet ready as insurance
Skipping economy units	No upgrades, no late-game damage	Place money units in the opening
Placing for damage, not coverage	Enemies walk through untouched sections of lane	Center the lineup inside the range buff

If you want to accelerate progression, the official Roblox experience page lists several optional passes. These are convenience purchases, not requirements — no pass has been shown to be necessary for a clear in available player data.

Pass	Listed Cost	Listed Benefit
VIP	500 Robux	Standard VIP perks
SHINY Hunter!	1,000 Robux	(benefits not detailed in the listing)
+50% Tokens	300 Robux	50% more currency in Raids mode
2x XP	300 Robux	Doubles earned experience

If you do want to check current pricing or confirm that a pass is still listed, the official Roblox platform page is the only source worth trusting — third-party lists go stale fast.

FAQ

What reward do you get for beating Neutral Corridor Act 1?

Community walkthroughs indicate that clearing Judgement Hall / Neutral Corridor Act 1 is the method used to unlock Sans. If your goal is adding him to your roster, this is the stage standing in your way.

Why is Woshua required for Neutral Corridor Act 1?

Woshua supplies the soak debuff. Player runs consistently identify soak as a necessary mechanic when fighting Sans in this stage, which is why he shows up in nearly every documented clear.

Can you clear Neutral Corridor Act 1 without Mettaton NEO?

Existing documentation only covers successful runs built around Mettaton NEO's leader skill paired with Knight Knight. Alternative compositions may exist, but their viability hasn't been confirmed in available player data — so if you're learning how to beat Neutral Corridor Act 1, start with the proven core.

What's the most important upgrade priority?

Range and attack speed first, raw damage second. The corridor's length means coverage and uptime decide whether a unit contributes at all, while damage only decides how fast it finishes what it already reaches.