Player2 Alternative for Unity - AI NPCs Without Player Accounts

A player buys your game on Steam, walks up to the first NPC and presses the talk key. Instead of a reply, a window asks them to sign in to another service, or a device code appears with a link to open in their browser. That is the flow a Player2 integration puts in front of players, and it is the main reason commercial teams look for a Player2 alternative.

Player2, from Elefant AI, offers game developers a free AI API. The developer pays nothing for AI usage because players pay instead, with their own Player2 accounts and an AI currency called joules. This post explains how that works, compares three ways to pay for NPC AI, and shows where Neocortex fits.

Who pays for the AI?

How Player2 works

Every AI operation in Player2's API, chat, character interactions, text-to-speech and speech-to-text, spends joules from the signed-in player's balance. Players get free models and daily credits, can add more on their Player2 profile, and patrons receive extra joules plus an advanced TTS engine by default. Some voices are reserved for patrons: the API docs state that one voice provider requires an active patron subscription.

Before any of that, the player has to be signed in. Player2's docs list four routes: playing on player2.game, a local login through the Player2 desktop app, an OAuth authorization-code flow, or a device-code flow. The Unity SDK tries the desktop app first and falls back to the browser with a code overlay. As a developer, you register a client ID in the Player2 developer dashboard.

When a request needs more joules than the player has, REST endpoints return HTTP 402 and NPC streams return an insufficient credits error. In your game, that looks like an NPC that goes quiet mid-session.

Player2 earns from patron subscriptions and ads, and it has run a revenue-share program that passes part of that income to games using its API, based on play time.

Three ways to pay for NPC AI

The choice is not really Player2 or Neocortex. It is which payment model your game can live with.

Players pay through a platform account

Benefits: no AI bill for the developer, and a possible revenue share. Trade-offs: an extra sign-up before the first conversation, NPC quality that depends on each player's balance and subscription tier, and models, prices and limits that you do not choose. This suits game jams, free experiments and mods where players already use the platform.

The developer pays a hosted service

Benefits: players just play, every player hears the same voices and gets the same character, and you control the experience end to end. Trade-offs: AI usage is a cost line you have to budget, so you price your game or your plan with it in mind. This is the model Neocortex uses, and it suits games you sell or ship to a client.

Models run locally

Benefits: no per-conversation cost and no account. Trade-offs: you ship or download models, manage hardware limits, and build voice and tooling yourself. Neocortex supports this while you prototype: you can run local LLMs in Unity through Ollama for text chat, then switch the same project to the cloud.

Who this is for

Neocortex fits teams that:

• sell a game or deliver one to a client, and need a plan that covers commercial use (Pro or Team)
• want every player to get the same voiced characters from the first minute
• have writers or designers who should own the characters without editing prompts in code
• need gameplay hooks: the game sends nearby objects and recent events, and replies carry an emotion tag plus actions such as OPEN_DOOR with a targetId
• want several NPCs in one scene: group chat supports up to six characters in one conversation on Pro and Team

If you are making a free jam game and your players already use Player2, the account step may not bother anyone. For a paid release, it is friction you have to design around.

What switching involves

Moving an NPC off Player2 is mostly removal. You take out the sign-in overlay and the joule checks, since players no longer need an account or a balance. The prompts you wrote in code become nodes in the editor: the character description goes into Agent and Personality, lore goes into Knowledge as PDF or TXT files, and the things the NPC can do become Actions your game already knows how to execute. Voice settings move to the Voice, Language and Accent nodes, and every player hears the same voice. Then you install the Unity SDK, open one of the six sample scenes, and point it at your character. Prototype on the free plan, and move to Pro before the game goes on sale.

The bottom line

Player2 moves the cost of AI to your players, along with an extra account and a balance that can run out mid-session. Neocortex keeps the player experience and the economics in your hands: you build characters in a visual editor, test them for free in the browser, ship them with the Unity SDK and its six sample scenes, and pay one predictable plan price.

Competitor details were last checked in October 2026.

Frequently Asked Questions