To use the iguana egg in Cyberpunk 2077, you ultimately want to hatch it into a permanent pet that lives in V’s apartment.

What the iguana egg is

  • The iguana egg is a missable miscellaneous quest item found during the main story mission “The Heist” in Yorinobu Arasaka’s penthouse at Konpeki Plaza.
  • It’s hidden behind a tree trunk on the first floor near the adult iguana that Yorinobu keeps as an exotic pet.
  • Once picked up, it stays in your inventory until you use it back at V’s apartment later in the game.

What to do with the iguana egg (step‑by‑step)

  1. Pick it up during “The Heist”
    • While exploring Yorinobu’s penthouse, go to the lower level where the iguana is, and look behind the tree trunk for the egg.
 * Loot it before you leave Konpeki; if you miss it, you originally couldn’t get it again without glitches or later updates that reopen Konpeki.
  1. Progress the story until after “Playing for Time” / meeting Takemura
    • After you complete Act 1, continue the main story in Act 2 until you go to Tom’s Diner and talk with Takemura (“Playing for Time” segment).
 * Only then will a small bowl appear in V’s Megabuilding H10 apartment.
  1. Place the egg in the bowl in your apartment
    • Return to V’s apartment and look for a bowl that can be interacted with (on a table in the living area).
 * Interact with the bowl to place the iguana egg inside; this starts the hidden “hatching” timer.
  1. Wait 90 in‑game days for it to hatch
    • The egg takes 90 in‑game days to hatch into a pet iguana in your apartment.
 * You can speed this up by repeatedly skipping time (e.g., 24 hours at a time) or by using PC mods that reduce the hatch time from 90 days down to shorter intervals.
  1. Enjoy your new pet iguana
    • Once hatched, the iguana lives in V’s apartment as a cosmetic pet, similar to the cat Nibbles, and you can interact with and pet it.
 * Each time you pet the iguana, Johnny Silverhand can appear and play guitar riffs as a little extra Easter egg.

If you missed the iguana egg or the bowl

  • Some guides mention glitches or later patches (like 2.3 reopening Konpeki Plaza) that let you return to Konpeki to grab missed items, including the iguana egg, without the old out‑of‑bounds exploits.
  • On PC, players may also rely on mods or console commands to spawn the egg or speed up the hatching process if they placed it before installing a “faster hatch” mod.

Fun lore and small details

  • Iguanas are framed as rare, nearly extinct exotic animals in‑lore, which is why Yorinobu having one (and an egg) is a flex of power and wealth.
  • In the “Tower” ending, if you had the iguana and Nibbles, Rogue eventually adopts them; they appear behind her in her ending message to V, which gives your pet a quiet little epilogue.

TL;DR:
Take the iguana egg during “The Heist,” progress the story until after you meet Takemura in Tom’s Diner, place the egg in the bowl in V’s apartment, wait 90 in‑game days, and it hatches into a permanent pet iguana with a Johnny Silverhand Easter egg when you pet it.

Information gathered from public forums or data available on the internet and portrayed here.