There are 4 Puzzle Pieces in Universal Tower Defense Z that players must find in various parts of the lobby, like inside the World Train and underneath the Event Bridge, on top of an abandoned building adjacent to the Luffy NPC & inside a compound next to the Mysterious Witch NPC. Collecting all 4 Pieces is part of the Despair of Defeat unit questline.
In Universal Tower Defense Z, players must find all the individual 4 puzzle pieces spread across the map as part of the Isagi/The Egoist questline. While the first location is easy to find, the remaining three are cleverly hidden by the developers, making it extremely challenging for players to acquire. So, if you are on a quest to get the Puzzle Pieces and are struggling, here is a perfect guide for you to follow & finish.
Where are the Puzzle Pieces located in Universal Tower Defense Z?
Below, you can find all 4 Puzzle Piece locations in Universal Tower Defense required to acquire the Isagi Unit.
Puzzle Piece Location 1

For the first Puzzle Piece, go towards the World Train POI on the map, right opposite the Summon area. This is an underground metro station, so climb down the stairs, then look to the right to find a train and a small walkable path. Reach the other side to find a Puzzle Piece.
Puzzle Piece Location 2

The Puzzle Piece is slightly tricky to acquire as it is present on top of a building. From the position of the Footballer NPC, if you walk towards the right, you will find the Luffy or Rubberman NPC. Climb the building adjacent to this NPC to find a Puzzle Piece at the top. Ensure you are double jumping and moving your directional key at the right time to reach the top.
Puzzle Piece Location 3

This Puzzle is located next to the Event area bridge. Go towards the Event area bridge to find two staircases. Head towards the left one to find a Puzzle Piece next to the Shop with the Shutter and multiple electric panels.
Puzzle Piece Location 4

The last and final Puzzle Piece is inside the compound where you can find the Mysterious Witch NPC. Head towards the Play & Extras POI and then walk straight to find the Witch NPC. Look inside the compound to find the Puzzle next to the cop car.
How to start the Egoist or Despair of Defeat Quest in Universal Tower Defense Z
To start the Egoist or Despair of Defeat Quest, you must first interact with the Football NPC standing right at the entrance of the World Train in front of the green door. The questline contains five different quests, and finding the four puzzles is one of them.
- Quest 1: Interact with the Footballer NPC
- Quest 2: Score 10 Goals in the Football Game Mode
- Quest 3: Find the 4 hidden Puzzle Pieces around the lobby
- Quest 4: Win the Football Game Mode with 5 Boundless Units in the Lobby
- Quest 5: Evolve Blue Rose.
For more on Universal Tower Defense, check out Universal Tower Defense Passives List - All Unit Abilities or Universal Tower Defense Trait Tier List & Reroll Guide