Define the core setting: Britannian occupation, Area system, resistance movements, Geass, Knightmares, and political conflict
Choose a specific time period: pre-rebellion, Black Rebellion, post-Black Rebellion, or an original alternate timeline
Create a lore bible with key factions, locations, ranks, technology, and major historical events
Build original regions inspired by the anime without copying exact names if you want safer originality
Design playable factions such as Britannian military, resistance cells, student groups, intelligence units, and mercenary forces
Add a Geass system with rare, unique abilities, strict activation conditions, and balanced drawbacks
Create Knightmare Frame mechanics with customizable loadouts, mobility, energy limits, and role differences
Include pilot progression through missions, reputation, faction rank, and story choices
Make the world map reflect occupied territories, military bases, ghettos, academies, and rebel hideouts
Add political systems like occupation control, rebellion influence, propaganda, and territory capture
Write questlines based on espionage, sabotage, rescue, assassination, diplomacy, and uprising
Include moral choice outcomes that affect faction trust, world state, and ending routes
Design NPCs with distinct loyalties, hidden agendas, and faction-specific dialogue
Add school or civilian life elements if using an academy setting
Make combat fast and tactical with ranged weapons, melee, cover, and mech battles
Balance Geass powers so they are powerful but limited by cooldowns, conditions, or one-time use
Add customization for uniforms, masks, emblems, Knightmare colors, and pilot titles
Create special events such as coups, city raids, hostage crises, and large-scale battles
Use original names for characters, factions, and units while keeping the political and dramatic tone
Build a story arc structure with rising tension, betrayal, secret identities, and revolution
Add hidden lore documents, intercepted messages, and collectible records
Make the user interface stylish, militaristic, and futuristic to match the setting
Test faction balance so no side dominates too easily
Keep the game focused on strategy, identity, rebellion, and power struggles
Avoid direct copying of characters, scenes, logos, music, or exact dialogue from Code Geass
Use fan-inspired themes while making the game legally distinct and original