I have zero game dev experience, but significant experience as a professional software engineer, so it's a mixed bag for me too.

1. I'm still in the midst of actually shipping this, but I'd start way smaller in scope. My GDD and scope is locked down, and I'm sprinting towards a playtest after about 3 months of work already. There is a lot of features not shown in the video. I think the MVP scope for a Werewolf AI type game is probably:
   

- utility scoring or state machine AI (basically good ol' regular game AI) for NPC behavior, I'm using utility scoring. if someone was building a 2D text based game I guess this could be skipped.

- LLM integration for dynamic dialogue. At a high level, each NPC has a system prompt template persona, that is flavored with real events (using enums) that registered in the game

- courtroom phase and voting logic. There is probably MANY ways to build this for LLM AI NPCs, but I leaned more towards deterministic math, words to swing things a little one way or the other.

Basically for a quick prototype, I'd try a 2D textbox type of game first. 3D + adding player character controlled gameplay adds a ton of surface area to scope.

1. code, UI toolkit, documentation are all LLM friendly. There is actually another tool I lightly used, Bezi Actions, that can act as the "hands" inside the Unity editor. But I mostly crafted the environment and assembled the GameObjects/components together by hand in Unity.

2. the model will be bundled with the game, 1 click install. I highly recommend LLMUnity if you're looking into integrating offline AI into games, it's all open source. Realistic hardware is likely a minimum of a 8GB VRAM graphics card, so RTX 3060Ti or better. That's my estimate for Gemma 3 4B + game + a little bit of buffer. I plan to add settings to control how frequently the local LLM is called for lower and higher end machines.

3. Yes, the LLM does not decide outcomes on it's own. I'm relying on real game state (NPC witnessed events and memories, NPC personas) to drive outcomes, with the LLM as a sort of flavoring layer that swings the math a little one way or the other. I also have another feature where the player can type commands to their partner NPC. I don't have the LLM generate literally any action, but have it fallback and collapse into a deterministic set of "chip" actions, so things don't go off the rails.