Home Overview Characters World Gameplay Social Multiplayer Technical Monetization Roadmap

§7 — Technical Design

Engine, networking model, save system, performance targets, UI/audio, and modding support.

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Engine & Tech Stack

Engine

  • Unity 6 — chosen for MP networking support, cross-platform, asset pipeline maturity
  • NavMesh + custom Sim behavior trees for pathfinding
  • Built-in physics engine

Backend

  • Game Servers: Custom dedicated server (C++/Go)
  • Account & Data: Cloud-hosted (AWS/Azure), PostgreSQL
  • Real-time Sync: WebSocket + custom state-sync protocol
  • Analytics: Mixpanel / Amplitude
Unity 6 project setup0%
Custom game server (C++/Go)0%
PostgreSQL schema & ORM0%
WebSocket state-sync protocol0%
Vivox / Agora voice SDK0%
BattlEye / EAC anti-cheat0%
Analytics pipeline0%

Save System

Cloud-First Save

All player data saved server-side. No local save required for online play.

What Is Saved

  • Sim appearance, traits, skills, relationships, career progress
  • Lot state (furniture, build, ownership)
  • Household composition
  • Account-level achievements and currency

Save Frequency

  • Player state: every 5 minutes + session end
  • Lot state: on change + every 10 minutes
  • Full backup: daily snapshot
Cloud auto-save (player state)0%
Lot state persistence0%
Daily backup snapshots0%
Offline local save mode0%
Online/offline sync conflict resolution0%

Performance Targets

Spec TierResolutionFPS TargetCurrent State
Minimum1080p30 FPS⬜ Not Started
Recommended1080p60 FPS⬜ Not Started
High1440p60 FPS⬜ Not Started
Ultra4K60 FPS⬜ Not Started
Full performance optimization pass is scheduled for Beta phase (Q1–Q3 2026). Current alpha builds target 30 FPS minimum on recommended hardware.

UI / UX & Audio

HUD — Needs panel (8 bars)0%
HUD — Mood indicator & Plumbob0%
HUD — Action queue display0%
HUD — Clock, calendar, money0%
Multiplayer HUD additions0%
Main menus & navigation0%
Social panel (relationships tab)0%
Accessibility (WCAG 2.1 AA)0%
Adaptive music system0%
SFX — object interactions0%
Spatial 3D audio0%
Simtongue language recording0%
Modding SDK (Year 1)0%