What will feel familiar
Skills that level by doing: mine ore, smelt it, forge gear, brew potions, and use all of it to push combat into harder zones.
Long-term goals measured in weeks: 34 zones, set bonuses, gems, enchantments and raid gear.
What's different
It's an MMO. Prices on the market are set by players, guilds raid together, and chat is live.
It runs in the browser for free, with no download, and you can start as a guest in seconds.
If you prefer the solo experience, the SSF (solo self-found) league means you can't buy from other players: you make or find everything yourself.
What you get in IdleWorlds
10 skills: Combat, Mining, Smithing, Herbing, Alchemy, Jewelcrafting, Spellcrafting, Tailoring, Woodcutting and Construction. Each one feeds the others, so a sword starts as ore you mined yourself.
34 zones to fight through, world bosses the whole server hits together, and 5 raid bosses for guild groups of up to 8.
A player-run market with listings and buy orders, guilds of up to 20 players, live chat, leaderboards, and a solo self-found (SSF) league if you'd rather do everything yourself.
Your character keeps working while you're away, so you come back to finished crafts, levels and loot.
Questions
Is IdleWorlds single-player like Melvor Idle?
No, it's multiplayer: a shared market, chat, guilds and raids. The SSF league is there if you want to play on your own.
Can I play it on my phone?
Yes. It runs in your phone's browser, and you can add it to your home screen.