My Bunker Rainy ranks and index icons

Mutations in My Bunker ride on a bunker. They are not a second plot. The only named mutation we can confirm from gameplay is Rainy. Day 9 of the developer devlogs also finished the index and said each mutation gets its own icon. The same short expanded artifacts that raise money multiplier, offline rewards, and offline time. This page ranks Rainy, explains those index icons, and keeps artifact stats in the same conversation because the index is where you will actually see both.

If you came here looking for a ten-row weather table, it does not exist in public notes. We will not invent Frost, Solar, or Honey mutations because comments asked for them. We will not copy Grow a Garden’s wet-crop list onto this tycoon. My Bunker is a crate-and-pad game inspired by My Market, released 4 August 2025 by Yeet Pizza Productions, running six-player servers.

S tier — Rainy on a high pad

Rainy Prison. An armored-crate session called an epic Rainy Prison the best pad on the plot at that moment. Prison was already winning the unfused cash race versus Lockdown. Rainy on top of that is the mutation rank that matters. Park your strongest guard on it. Do not fuse that copy away unless you are completing Lockdown Ultimate with a different Lockdown.

Rainy on Steampunk or Lockdown. We have not seen a studio screenshot that labels those pairs, but the rule is the same: Rainy multiplies whatever cash the bunker already prints. A Rainy Nature is still Nature. A Rainy Steampunk, if you ever roll it, inherits Steampunk’s session reading near $2k/s before guards. Apply Rainy to the bunker you would already keep on the bunker tier list.

Rainy is S because it is the only confirmed overlay and because players treat the epic version as a plot-defining roll. It is not S because a thumbnail wrote $999,999/s in raindrops. That sticker is still marketing.

A tier — Rainy on a fuse ingredient you must keep

If Rainy lands on Space or on your last Lockdown, you now own a conflict. Space wants to become Black Hole. Lockdown wants a rogue robot for Lockdown Ultimate. A Rainy ingredient is more valuable on the pad until you have a duplicate. Duplicate first, then fuse the unmutated copy if the machine allows it. Community fuse notes are not a patch note; check the machine text on your client before you destroy a Rainy.

B tier — Rainy on mid pads

Rainy Graveyard or Rainy Vault is a real upgrade over the plain model and still worse than moving the overlay logic to Prison. You cannot peel Rainy off and slap it on another bunker in any public description we have. You live with the pair. That is why crate choice on the crate tier list matters: armored and OP crates are how Rainy shows up on a pad you actually want.

C tier — Rainy on Nature

A Rainy Nature still prints Nature-like cash with a weather coat. Keep it only if you have empty pads. Overwrite the bunker when Lockdown or Prison drops, even if you lose the rain visual. The mutation does not rescue a D-tier shell.

F tier — fake mutation lists

Comment sections asked for frostbite bunkers, honey bunkers, pizza bunkers, and solar shells. Those are bunker ideas, not mutations, and they are not ranked here. Index icons that you cannot identify should be screenshotted and checked against your own collection, not against a fan spreadsheet that copies another Roblox farming game.

Index icons

Day 9: “We also finished the index. It looks way better and has an icon depending on what mutation you got on it.” That is the official language. The index is the collection UI for bunkers you have seen, with a mutation glyph so two Prisons do not look identical. After the QOL update you can hide side-screen items, which makes those glyphs readable instead of buried under shop clutter.

Use the index as a checklist, not as a cash table. If the icon says Rainy and the pad is Prison, you have the S-tier pair. If the icon is blank, the bunker is the base model and should be ranked only on the bunker list. We have not confirmed a second mutation name in footage. Until a patch or a later devlog names one, extra icons are “unknown overlay” rather than a new letter rank.

Artifact stats the index sits beside

The same Day 9 short says artifacts now have a long list of unique designs and that they increase money multiplier, offline rewards, and offline time. Those three numbers are why mutations and artifacts belong in one planning pass even though they are different item classes.

• Money multiplier scales the cash the bunker already prints. Rainy plus a money-multi artifact on Prison is the stacking you want. Rainy plus a money-multi artifact on Nature is still a Nature problem.
• Offline rewards raise what you collect when you rejoin. Day 6 added offline payouts so players return. A mutation does not replace that system; it rides along.
• Offline time stretches how long the AFK clock runs. Artifacts that add time are how a six-player plot still pays after you leave the server. Mutations do not, in any public note, add extra hours by themselves.

Stacking order we recommend: place the best bunker, apply the best guard, keep Rainy if it landed on that bunker, then equip artifacts that feed the three stats. Do not buy a crate because the shop implies artifacts mutate bunkers. They have not been described that way.

What we will not guess

We will not publish a Rainy multiplier such as 2x or 5x. No official number is out. We will not claim Rainy is weather-event only, crate-only, or fuse-only, because sessions show it as a crate result and the index shows it as an icon. We will not claim mutations steal. Guards still handle other players on a six-player server; see the players hub for titles, not for PvP mutation matchups.

When a second mutation is named in a shop tile, a Halloween UI, or a new short, it will get a letter here. Until then, Rainy is the list. Put it on Prison, Steampunk, or Lockdown. Read the index icon. Let artifacts handle money multi, offline rewards, and offline time. Ignore any mutation chart that needs a Trello or a Discord we cannot verify.