A sandbox where you build the map, the buildings and whole towns, then walk in and talk to the people. Its systems could make it one of the strongest games we have reviewed, if you put in the hours. Out of the box, shops and quests barely work.

RPBuddy is an AI RPG sandbox that runs in a browser. It calls itself “The Ultimate AI RPG Sandbox”. You draw a world on a hex map, place settlements and buildings in it, fill them with characters, and then play a character of your own inside it: you walk into buildings, talk to the people there, take jobs from a Bounty Board and fight. The world keeps going when you are not looking. Characters follow daily routines, pass gossip to each other, and a daily digest records what happened in each town.

It offers four settings (Medieval Fantasy, Modern Day, Neon Future and Sci-Fi Colony) and five art styles for the pictures it paints. It is single-player. It works on phones and can be installed as a home-screen app, but there are no store apps, and its own FAQ says desktop is still the best way to build. It is for adults only, and mature scenes are available on paid plans.

What It Scores

RPBuddy scores 3.4 out of 5, seventh of the thirty-one platforms on our benchmark, level with Isekai Zero. We gave it our Extended test. It is a game of what you put in: the scores below are what a player gets without spending many hours shaping the world, and several of them go up if you do.

Signature Design — 5. The highest score we give. You can design buildings with typed purposes (an inn, a thieves’ guild, a barracks), with your own rooms, floors, hallways and outside appearance. You can found a whole settlement. The world map, and how far a player can change the world, are genuinely new. Combat can be dice rolls or a timing system, where stopping a moving marker well decides between a critical, a hit and a miss, which makes a fight a test of skill.

NPC Fidelity — 4. Out of the box, characters can feel bland or alike. Give them a personality in their profile and they hold it very well. With hours of work on each character it could reach a 5.

Longevity — 3.5. Still a little bare to keep you for months, but not bad.

Player Agency — 3.5. There is no puppeting. There is a different kind of railroading: the game limits what you can interact with, not where the story goes. We could not, for example, choose to kill a citizen or start a fight in an inn.

Memory & Continuity — 3. The memory is selective, and it often fails to bring up what matters in the moment. That led to strange turns in the story and in conversations, and to lost goals. It sometimes did not add automatic memories where they were needed. You can raise this by adding memories by hand, for hours.

Mechanical Depth — 3. Combat and moving around the world would score a 5. Commerce and quests did not work in our testing. How much you can interact with the world varies from a lot to almost nothing, depending on where you are.

Determinism & Fairness — 2. Fair in combat and in relationships. But money meant almost nothing: we could not sell our loot or find things to buy, so getting better gear meant roleplaying the trade and then editing the inventory by hand.

Pricing

Free to start, with no card. Prices are from RPBuddy’s own pricing section on 19 October 2026.

Plan	Price	What you get
Traveler	Free	50 image credits, 50 AI actions a day, unlimited worlds and manual building
Adventurer	$10/month or $100/year	200 image credits a month, unlimited NPC chats
Hero	$20/month or $200/year	500 image credits a month, advanced and premium image models, message editing and re-rolling, enhanced NPC memory, early access to beta features

Extra image credits come in packs of 50 for $5, 100 for $8 and 300 for $20, and packs never expire. A subscription can be refunded within 48 hours if none of its credits were used; credit packs cannot. On the free plan, your prompts and the replies may be used to train RPBuddy’s AI. On paid plans they are not.

Verdict

RPBuddy has the systems to be one of the strongest games on our board: a world you build with your own hands, characters who keep a personality you give them, and combat that rewards skill. To get there you have to spend dozens of hours on your world, then on your characters and your own character, and the shops and quests are still being built. It is the definition of “you get what you put in”. At 3.4 it is seventh on our board, and a strong pick for players who want to build the world they play in.

Product names and trademarks are the property of their respective owners. Arcanum is not affiliated with RPBuddy.