Week 6: Building a browser-based MMO with vibe coding
Six weeks of vibe coding and there’s a playable MMO at the end of it. Realms of Eldermyr is a free, browser-based multiplayer action-RPG where one shared realm stays live for everyone online at the same time.
What It Is
No download, no install. You click, it loads, you play. The pitch is a persistent world where you level a hero, go dungeon delving, and hold the frontier alongside whoever else happens to be online. Progress saves, so you pick up exactly where you left off on your next session.
Why It’s Worth a Look
The interesting part here is not the game itself but the build. Six weeks from zero to a live multiplayer RPG running in a browser is a fast ship, and it came out of a vibe coding workflow. For indie hackers curious about what that process actually produces at week six, this is a concrete artifact to poke at.
The game includes a Field Guide (a built-in wiki covering drop tables and enemy loot) which suggests the developer is already thinking about player retention, not just the initial build.
The Basics
- Price: Free
- Platform: Browser, no download
- Mode: Multiplayer, shared persistent realm
- Session continuity: Same hero, same realm, resumes from last save
If you are building something in public and want a reference point for what a six-week vibe coding sprint can ship, Eldermyr is worth a few minutes of your time.
I’m founder of BizStack at Cagri Sarigoz LLC and a passionate advocate for entrepreneurs.
With over 14 years in tech, marketing, and AI, including my role as Head of SEO at CitizenShipper and co-founder of TaleBot at Intale AI, I’m dedicated to sharing genuine, useful product insights and tips.
At BizStack, I aim to cut through the digital noise to provide clear, actionable advice.
And more than all else, I’m a father to a (always) little girl and a husband.
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