ITTA Boss Rush Walkthrough: Win Every Fight and Find Every Secret

Last Updated on 24 October, 2025

ITTA places you in a haunting pixel-art world where a young girl named Itta awakens to find her family gone and a strange feline spirit guiding her through perilous trials. This guide offers a complete, step-by-step walkthrough of ITTA to help you navigate every major area, collect all weapons and upgrades, uncover secrets, and conquer all bosses. It solves the common problems of getting lost in the exploration zones, missing critical items that weaken your build, and getting stuck on challenging boss patterns by offering clear directions, strategic advice and full collectible checklists.

Quick Fact: The game features 18 main bosses, making it essentially a boss-rush built around exploration and weapon upgrades

• Game Overview
• Getting Started and Basic Controls
• Early Area: The Old Garden
• Second Area: The Glass Gardens
• Final Area: The Yorke Ruins
• Weapon and Upgrade Locations
• Boss Fights Strategy
• Collectibles and Achievements
• Conclusion

1. Game Overview

The game is a bullet-hell action-adventure in which you play as a young girl who awakens in a surreal, ruin-choked world after discovering her family’s demise and is guided by the spirit of her pet cat. With only a revolver at her side, she must explore desolate hubs, collect powerful spirit weapons, and face 18 punishing bosses in intense twin-stick combat. Exploration and narrative intersect between encounters, offering a melancholic yet stylish world filled with secrets, weapon upgrades, and optional accessibility features for varying skill levels.

• Developer: Glass Revolver
• Publisher: Armor Games Studios
• Release date: April 22, 2020
• Platforms: Windows (PC via Steam) and Nintendo Switch
• Genre: Action, Adventure with bullet-hell, top-down boss-rush elements
• Core Loop: Explore hub zones → Acquire weapons/upgrades → Enter boss arena → Learn attack patterns & dodge → Defeat boss → Unlock next zone and new gear

Heads-Up: In ITTA you won’t find hordes of weak enemies in the overworld because most of the action occurs in boss arenas.

2. Getting Started and Basic Controls

When you begin ITTA you control Itta, armed initially with the father’s revolver and accompanied by the ghost. You will begin in a hub-area (Old Garden) and gradually unlock new zones by defeating bosses and collecting key weapons.

Use twin-stick style movement: one stick (or keys) to move Itta, the other aims and shoots. You dodge attacks, use the roll/dodge mechanic to evade, switch weapons and explore. The game allows toggling of damage multipliers or invincibility if you find fights too strenuous.

Quick Reminder: You can activate the “2x Damage” or full “Invincibility” accessibility options if a boss fight is proving too steep.

3. Early Area: The Old Garden

You start in the Old Garden. Follow the trail of blood to your mother and trigger the first major story beat.

Exploration

1. Walk forward from the starting point through the forest path and encounter your first corrupted enemies.
2. Follow the trail to the waterfall that hides a health upgrade behind it.
3. Explore the garden building to the south-east to find another health upgrade.

Weapon pickups

• You already have the Revolver from the very start.
• To the left of the first area you entered you will find the Shotgun behind destructible walls or via a longer detour.

Minor Boss and Path Forward

Clear the first regional mini-boss to unlock progression to the next major zone. After defeating the first boss, you unlock access to the Glass Gardens zone.

Practical Tip: Explore each hub area thoroughly before diving into the next boss because hidden weapons and upgrades often make the difference

4. Second Area: The Glass Gardens

Once you enter the Glass Gardens you will see larger open spaces, new puzzles (light-pillars, blocked paths) and more dangerous boss fights.

Make sure to:

1. Locate the Bomb weapon early: bottom of the first screen in the Gardens then go right; inside a building east of the entrance.
2. Find the Machinegun south in the Gardens in a building next to the right side of the corridor of faces.
3. The Flamethrower appears later (in the Ruins area) but you can gear up here to prepare for that.

Puzzle Elements

In the Gardens you will find barrier pillars requiring the Flamethrower to light them and open paths. Search broken walls, hidden entrances and secret rooms. Explore thoroughly.

Boss Engagement

One of the region-bosses is located in this area. Prepare by collecting above weapons, health upgrades and Inner Beast upgrades. Before attacking the boss, ensure you have at least one non-basic weapon and the path to exit is clear.

Upgrade Locations

1. Behind a waterfall in the forest area south of the Ruins entrance you will find another health upgrade.
2. The final health upgrade is in the far south area of the Ruins (accessible after you unlock that zone).

Resource Note: Community guides list full locations for weapons, inner-beast upgrades and cat statues, so keep a tab open if you’re 100%ing it.

5. Final Area: The Yorke Ruins

After clearing the Glass Gardens boss, you proceed to the Yorke Ruins, the third region of the game, with the toughest foes and final boss.

Important Items

1. The Greatsword (melee) is found in the forest east of the King boss’ room behind a cracked wall.
2. The Scythe appears just before the Wolf boss’ room: behind a cracked wall above stairs near the Incomplete Map.

Combat Preparation

Make sure you have all weapons collected (Revolver, Shotgun, Cannon, Bomb, Machinegun, Flamethrower, Greatsword, Scythe) to exploit their strengths. Make sure all health upgrades and Inner Beast upgrades are collected.

Final Boss

The final boss, Mono, awaits at the end. You must have explored enough to access the Void Gate area. If you want the “Going Home” achievement, ensure you return to the starting room after killing ten bosses and trigger the cut-scene. Note: this achievement is missable if you skip that return.

Quest Tip: If you get stuck on a boss, remember you can return later after collecting a new weapon or upgrade rather than brute-forcing the fight immediately.

6. Weapon and Upgrade Locations

This section compiles key weapons and upgrades in one place for easy reference.

Weapons

1. Revolver: your father’s revolver. Medium fire rate, low damage. You start with it.
2. Shotgun: medium fire rate, medium damage, wide spread. Found left of first area behind walls or via long path.
3. Cannon: low fire rate, very high damage. Found near cartographer on stairs left.
4. Bomb: thrown weapon, very high damage, opens secret paths. Building east of Gardens entrance.
5. Machinegun: high fire rate, medium damage. South of Gardens, building next to corridor.
6. Flamethrower: very high fire rate, low damage, used for lighting pillars. In Ruins south area.
7. Greatsword: melee weapon, high damage. Forest east of King boss, behind cracked wall.
8. Scythe: thrown weapon, high damage (boomerang style). Just before Wolf boss area.

Health and Inner Beast Upgrades

1. Health Upgrades: H1 behind waterfall entering second area; H2 in building south-east; H3 another waterfall south of Ruins entrance; H4 far south of Ruins, right side.
2. Inner Beast Upgrades: B1 just before Gardens entrance up stairs; B2 in area south of Ruins entrance; B3 in Gardens roof area above blacksmith.

Strategy:

Focus on collecting weapons early that suit your play style. If you prefer wide spread and crowd control, lean Shotgun and Machinegun. If you prefer high-damage bursts, target Cannon and Greatsword. Always grab health upgrades as soon as you spot them because survival in boss fights beats fancy weapons.

Pro Tip: Even if a new weapon looks flashy, don’t abandon your reliable spread or shotgun too early. Many players report defaulting to it despite the variety.

7. Boss Fights Strategy

Boss fights in ITTA revolve around pattern recognition, exploiting weapon strengths, and dodging with precision.

General Tips

1. Study each boss’s telegraphed attacks before unleashing heavy weapons.
2. Swap to high-damage weapons (Cannon, Greatsword, Scythe) when the boss reveals a vulnerable phase.
3. Use area-effect weapons (Machinegun spread, Bomb) to handle adds that spawn during the boss fight.
4. Use the Inner Beast ability once unlocked to deal burst damage or clear rooms of projectiles.

Example Strategy: Region Boss in Glass Gardens

Enter the arena with full health and at least one heavy ranged weapon. Wait until the boss emits red glows or summons minions. Then switch to Machinegun to clear adds, then Cannon to hit the boss during vulnerability. When pillars/light barriers appear requiring Flamethrower later, ensure you have unlocked it.

Final Boss (Mono)

The final boss uses multiple phases: bullet-hell patterns, summoned minions, and environmental hazards. Use all your collected weapons interchangeably: begin with Revolver or Shotgun to stay mobile, then switch to heavy weapons when openings appear. Make sure your health and Inner Beast upgrades are maximised before this fight. Missing one upgrade makes the fight significantly harder.

Boss Tip: Don’t panic when you hit a boss’s second or third phase and it unleashes a new bullet-pattern; that’s part of the design. Reset your rhythm and stick to your dodge-shoot loop

8. Collectibles and Achievements

If you aim for 100% completion, this section helps you gather everything.

Cat Statues

The game hides 18 “Spirit Cat” statues across zones. Finding all unlocks the “Cat Lady” achievement.

1. Cat #01: In Old Garden, follow blood trail to your mother.
2. Cat #02: Old Garden west of entrance to Glass Gardens.
3. Cat #03: Glass Gardens south of blacksmith.
4. And so on…

Important Achievements

1. “Arsenal”: Collect all spirit weapons.
2. “Spirit Armor” : Collect all health upgrades.
3. “Explorer” : Complete 100% map (interior areas not required necessarily).
4. “A Tiny Window” : Complete the Shepherd’s story side-quest (find sheep and talk to him).
5. “All I See Is The Void” : Finish the Architect’s story.
6. “No Death Run” : Defeat all bosses (or at least regional bosses plus Mono) without dying. Note: community reports say achievement requirements may vary.
7. “Ouroboros” ” Kill Mono using only the Revolver. Requires skill and thorough upgrades.
8. “Going Home” : After killing ten bosses, return to the starting room and trigger the cut-scene. It is missable if you skip that return.

Collectible Route Suggestion

1. In Old Garden collect H1, H2, find Cat #01 and #02 while exploring.
2. Enter Glass Gardens: pick up Bomb, Machinegun, seek upgrade B3, collect multiple Cat statues.
3. Explore Ruins next: Flamethrower, Greatsword, Scythe, health upgrades H3 and H4, Inner Beast B1 & B2.
4. After collecting everything, head to final zone and complete boss-rush then final boss.
5. Ensure after ten boss kills you return to the hub for “Going Home” before proceeding to final boss if doing achievement.

Quest Tip: For the Shepherd side-quest, track down his missing sheep and return to him. You must speak to him several times to trigger the full event

Conclusion

You now have a detailed walkthrough for ITTA from start to finish: from your first steps in the Old Garden, through the Glass Gardens, into the Yorke Ruins, collecting all weapons, upgrades and secrets, and tackling each boss with strategy. The key to mastering ITTA lies in exploration, collecting the right gear, learning each boss’s pattern, and playing actively.i.e. dodge first, strike when the opening appears. With patience and skill you can unlock all achievements, complete the full map, and experience the full narrative of Itta’s journey. Good luck, and may your cat-spirit guide you through the Void Gate!