Muscle Transform Simulator Worlds and Roster

Muscle Transform Simulator currently runs six live worlds. Each world is a map with its own smash props, its own egg stand, and a short character roster you buy with Gold. The Worlds icon sits on the left of the HUD. You cannot teleport into a map whose roster you have not finished. Finish the previous lineup, pay every Gold cost, fill every bar, then the next world opens. That rule is the whole campaign.

Castaway Studios RBLX launched the experience on 8 September 2025. It is free-to-play, online, and live, with ten-player servers and more than 101 million visits after the 16 June 2026 update. The city is shared. The unlocks are not. Your World 4 is still locked if Spike Man is not maxed, even if the player next to you is already on Dark Warrior.

Unlock rule

Open Characters. The next body stays locked until the current one is complete. Complete means the arm, leg, and body bars are full, not that you stood near the machine. Pay the Gold, equip it, transform as on Transformations, and train again. When the last body in a world is done, Worlds lets you teleport. Premium forms such as Venom, King Hulk, and Master Rage do not punch a hole in that chain. They only make the Gold and the bars arrive faster. After a roster is done, How to Rebirth is the loop that starts the next climb on better multipliers.

New worlds also drop new eggs. Lobby eggs stay in spawn for cheap Gold rolls. World eggs cost more and exist so the pet bag can keep up with the new smash health. Hatch the new stand after the current closer is paid, not instead of paying the closer. Names and roles for those pets live on the pet list; this page only cares that each map adds a stand.

King Hulk and World 4 in Muscle Transform Simulator

World 1

World 1 is Rage Man, Gray, and Spike Man. Rage Man is the green Hulk-like teacher. Gray is the mid step. Spike Man is the closer and the first body that starts to feel like a smash account. You will live here longer than the thumbnail suggests because the first Gold weights, the first lobby eggs, and the first smash clusters all teach the loop. Do not leave a bar half full and then wonder why World 2 is still dark.

World 2

World 2 is Warrior, Baldy, and Hero. Videos call this the anime world and nickname the trio Goku, One Punch Man, and All Might. Use the shop names in menus. Use the nicknames only so you can match the models. Hero is the closer. Once Hero is maxed, World 3 is the next gate, not a side event. Smash health jumps. So do egg prices. If World 1 pets still look fine on the tooltip, hatch a couple of World 2 eggs before you assume the bag is done.

World 3

World 3 is the odd one. Creator footage called it weird. Cake is the named form we will print, and Cake surprised people by hitting hard after a joke first impression. The rest of the world is odd forms you still have to max because the unlock rule does not care about fashion. Pay them, train them, and move. This is also where a mushroom pet showed up as a world-themed hatch. Buy the new eggs if Gold is flowing; do not stall here because the art direction feels unlike World 2.

World 4

World 4 is Galaxy Creature or Galaxy Guardian, Money Man, and Void Guardian. Galaxy Creature is the opener you take into the new map. Money Man is the mid-world Gold check. Void Guardian is the closer, and footage showed a large Gold tag on that buy. King Hulk became a common smash partner on this map because the props finally ask for a late premium body. World 4 is where power creep stops being a rumor. Rank that creep on the character tier list and keep buying the three shop names in order.

World 5

World 5 is Gladiator, Warrior, and Dark Warrior. Gladiator is the opener. World 5 Warrior is not World 2 Warrior; it is the gladiator-era follow-up with its own Gold tag. Dark Warrior is the World 5 closer. Once Dark Warrior is maxed, Worlds opens the ice map. Smash on Dark Warrior until Ice Warrior is paid, hatch the World 5 stand if Gold is spare, then teleport. The May 2026 drop is on the World 6 update.

World 6

World 6 is the ice map. Public May 7, 2026 footage named Ice Warrior as the opener and Mr. Frozen Evil Guy as the closer. You drop to zero power after the Ice Warrior buy, same as every earlier body. Press F, max the three bars, smash the colder props, then pay Frozen Evil. A diamond aura spinner and a multi-million Gold egg stand arrived with this map. Spin auras only after Ice Warrior is owned; hatch after the opener is paid. Galaxy was called the best legendary wrap in that session. Rank wraps on the aura tier list. Do not type WORLD6 in the codes box. No such public string exists.

Eggs, weights, and the map you should actually stand in

Each new world is a better smash floor and a more expensive egg floor. Teleport to the newest map you own when you want Gold. Teleport back to spawn when you want lobby eggs, cheap weights, or the character shop. Galaxy weights around 500 Robux and later Titanic limited weights travel with you; they are not world-locked forms. Pets equipped from the backpack travel too.

The practical mistake is farming World 1 cars after Void Guardian is already in the bag. The props no longer match the power, so Gold per hour collapses. The other mistake is teleporting to World 5 and then wondering why the next character is still locked; the shop still wants Gladiator and World 5 Warrior paid first. Press F on the body you are training, smash on the body that prints Gold, and use the Worlds icon only after the previous roster is actually done.

Stay on the map whose props still break in one or two hits from your current transform. If a building feels spongy, you either skipped a closer or you are smashing on the skinny lobby model. Transform, buy the missing name, and leave the old city behind. The six live worlds are a straight line, and the only way off a rung is to pay for the next one.