If you’re aiming to achieve 100% completion in A Planet Full of Cats, meticulous planning is essential. This charming puzzle-adventure game offers nothing permanently missable, but the achievement for full completion will only trigger if you’ve accomplished every task before engaging the final boss. This guide provides a step-by-step walkthrough to ensure you collect every cat, upgrade, and key item while navigating the game’s often-unstated progression gates, saving you from hours of backtracking and confusion.
Complete Progression Walkthrough
The following path guides you through the main story while ensuring you collect essential upgrades and trigger key events.
Start on Gattaca
Begin by entering the left building to meet Lily and learn the core gameplay loop of finding cats. Clear the first rooms, then meet Plume to receive the Bomb and Laser, your first critical tools. Use a bomb on a nearby suspicious wall tile to access a hidden room with a memory puzzle; completing it grants the Healing ability. Solve the elevator puzzle to unlock deeper areas.
Interlude and Catnipia
After meeting Lino, head left into the bathroom and bomb another hidden wall to find the Cat Ears upgrade. Return and use the elevator to descend. In Catnipia, use Healing on cats and explore the tower room to find Lino’s badge and unlock the Power Paw ability. Return to the elevator area to face your first boss; defeat it to earn your first Blue Crystal.
Pawrion and the Water Crisis
Descend from the elevator to address the water issue. Unlock Fur Armor here, then move right to equip coats on cats. Use Power Paw to break a frozen hatch and solve the subsequent pipe puzzles across multiple rooms. Activating the valve restores water flow.
Furzon, the Crash, and Hisstar
Proceed into the icy Furzon, giving cats coats. You will find the crucial X-Ray Vision upgrade here. Afterward, you’ll receive a call about a crashed ship (PUSS Explorer). Investigate it to find all cats and collect an important access badge. With this badge and the Toxic Suit (found earlier), return to a previously locked area in Hisstar. Use X-Ray Vision to reveal hazards, find the Battery, and solve the puzzle to unlock the subway. Ride it, solve a terminal puzzle, and face another boss to earn your second Blue Crystal.
Growlarian and the Third Crystal
Return to the starting area and use the Battery on a vehicle to reach Growlarian. Unlock the lab, collect four bottles, and solve a color puzzle to create Poison. Return to Hisstar, use the Poison to access and defeat the next boss, obtaining the third Blue Crystal.
Nofur and Endgame Setup
With three crystals, return to Catnipia to unlock the path to Nofur. Here, you will gain the Teleport ability. Inside the temple, retrieve the Raw Crystal and give it to Plume to receive the fourth Blue Crystal. This unlocks the ancient elevator, leading to the final area.
Achievement Checklist: Before the Final Boss
The 100% achievement only registers if you complete all of the following before the final sequence. Missing any item will require a replay.
- All cats found in every area.
- All area statuses marked as “safe”.
- All upgrades collected (listed below).
- All character quests fully completed.
All Essential Upgrades
Upgrades are mandatory for progression and 100% completion.
- Bomb and Laser: Obtained early from Plume.
- Healing Power: Found in the elevator room on the main floor.
- Cat Ears: Located in the washroom on the lower level.
- Toxic Suit: Found in the infirmary area.
- Power Paw: Located in Catnipia’s tall plant room.
- Fur Armor: Found in Pawrion; required for cold areas.
- X-Ray Vision: Acquired in Furzon; critical for removing fungi globally.
- Cat Eye: Found in Hisstar.
- Teleport: Unlocked in Nofur near the temple.
Key Items You Must Not Miss
Certain items are pivotal for unlocking new zones and bosses.
- Blue Crystals: Awarded from bosses and Plume; required to access Nofur.
- Lino’s Keycard: Found in Catnipia; unlocks restricted living areas.
- PUSS Explorer Keycard: Collected from the crashed ship.
- Battery: Found in Hisstar; used to reach Growlarian.
- Poison: Crafted in Growlarian; required for a boss fight.
- Fruit, Meat, and Shrimp: Part of Vivi’s questline; unlocks Puru and completes Meownyan.
- Raw Crystal: Found in Nofur; given to Plume for a Blue Crystal.
Critical Character Quests
Completing these quests is integral to progression and 100% completion.
- Lily: Heal all cats in the starting area to unlock Coccygeal.
- Plume: Provide the Raw Crystal found in Nofur for a Blue Crystal.
- Lino: Find his lost keycard in Catnipia.
- Fufino: Help cold cats in Furzon by giving them coats; triggers the ship crash event.
- Fungi Removal: Use X-Ray Vision to clear all fungal growths across every region.
- Vivi: A multi-stage quest involving collecting Fruit, then Meat and Shrimp, which ultimately unlocks Puru and allows full completion of Meownyan.
Understanding Locked Doors and Progression Gates
Areas are systematically gated to prevent sequence breaking.
- Keycard Doors: Require Lino’s card or the PUSS Explorer card.
- Cold Areas: Require Fur Armor to be equipped.
- Toxic Zones: Require both the Toxic Suit and a keycard.
- Path to Nofur: Locked until you possess three Blue Crystals.
Glitch Cats and the Final Puzzle
Special hidden Glitch Cats are located in areas like Pawrion, Deepurr, Growlarian, and Nofur. After collecting every Glitch Cat, return to Plume and interact with the black orb to solve the final puzzle and unlock its associated achievement.
Achieving 100% in A Planet Full of Cats is a test of thorough exploration and systematic checklist completion. By following this guide to secure every upgrade, complete every quest, and rescue every feline before the final confrontation, you can ensure the achievement triggers correctly, leaving no cat behind on your journey across this whimsical planet.
