Introduce barbarians as a non-diplomatic civ appended to state.civs,
providing escalating pressure that scales with difficulty and target
civ era. Key mechanics:
- Uprisings spawn on explored tiles, capped by a growing population
limit to keep raids an event rather than a fourth empire
- Era-based pressure curve: raids decay as a civ advances, stopping
entirely at hard-stop techs (industrialization/conscription/railroad)
- Killing hordes summons a Barbarian Leader with an escort; cornering
the lone leader triggers a gold ransom scaled by era and difficulty
- Captured cities are either razed (small) or held inert (large)
- Leader expires after a set lifetime if not ransomed
Diplomacy and AI carefully exclude barbarians to prevent three traps:
shared-enemy attitude pollution, permanent war phase pinning, and
government ladder lockout. Pre-feature saves remain compatible.
New assets: optional civilization-barbarians.png sheet (8 frames).
Updated sprites.md and unit tooltips. Comprehensive verification tests
added in verifyCivilization.js.
Introduce active diplomacy where rival leaders approach the player with
requests, demands, trades, and gifts rather than passively waiting.
New CivilizationDiplomacy.js module handles:
- 9 request kinds (joinWar, breakTreaty, borderUltimatum, demandGold,
demandTech, techTrade, ceasefire, peace, alliance) with initiative
tiers so urgent calls to arms aren't drowned out by filler offers
- Cooldowns per (leader, target, kind) plus a per-leader gap so a
leader can't spam different requests to bypass rate limits
- Frustration grudge (0-100) raised by refusals, decaying each turn
and dragging attitude toward hostility through the ordinary war path
- Escalation: frustrated leaders demand compensation, then renounce
treaties at breaking point, with ordinary hostility finishing the job
- Border ultimatum promises checked when pledges expire (double penalty
for broken word)
- Unprompted gold/tech gifts from leaders with high attitude
- Staleness validation so requests the world invalidated are dropped
- AI-to-AI requests resolve immediately through the same pipeline
UI changes:
- AI requests queued on state.pendingRequests, presented via audience
popup at the start of the human turn (one per turn, configurable)
- Diplomacy screen shows ACCEPT/REFUSE with consequence hints until
answered; unanswered requests lapse with half-weight penalties
- New event types: treatyRenounced, pledgeBroken/pledgeKept, aiGift
- Leader dialogue for demands, refusals, gifts, and renouncements
- Tetris Attack menu gets a title art backdrop
Data/infra:
- diplomacyRequests tuning in civilization-rules.json (thresholds,
cooldowns, attitude weights, per-request config)
- Frustration, requestCooldown, lastRequestTurn, pledges fields on
civ state — all backward-compatible with old saves
- Full verification suite covering eligibility, resolution, cooldowns,
frustration arc, serialization, and fuzz testing
Add audio feedback for combat events by introducing unit-specific sound
effects that play during attack animations. Each unit in civilization-rules.json
now has a battleSound property mapping to appropriate audio assets. Adds 10
new MP3 files (arrows, cannon, catapult, gunfire-classic/modern, helicopter,
missile, submarine, sword, tank) and integrates playback in CivilizationMapView's
combat lunge animation.
- Introduce difficulty-based combat multipliers and veteran promotion chances (Chieftain/Warlord eased, Prince+ neutral)
- Randomize leader selection on setup screen and add dynamic portrait with pick speech
- Replace inline hover text with a centralized Tooltip component for tech tree, foreign cities, and buildings
- Add descriptive flavor text for governments and terrain improvements
- Add building completion notifications with a "VIEW CITY" action button
- Expand deferred city attack cinematics to cover explored rival cities
- Improve Tempest flipper AI to scale lane-flipping chance/cooldown with level and enable climbing flips
- Add verification tests for difficulty combat modifiers and veteran rates
Introduce civTraits data structure with 8 traits (scientific, industrious,
commercial, philosophical, zealous, mercantile, pioneering, wealthy) that
provide science/gold/shield multipliers, starting gold, and starting
technologies. Assign each opponent a trait in opponents.json.
- Apply trait bonuses to starting gold and grant starting techs during
game creation in CivilizationLogic
- Route trait multipliers into cityYields for science, gold, and production
- Add a leader detail panel to the setup screen showing name, trait name,
and description, updated live when selecting leaders
- Add validation for civTraits in CivilizationRules (multipliers positive,
starting techs valid, etc.)
- Add verification tests for trait application and city yield multipliers
- Nudge unit sprite position 5px down for better tile alignment
Brian Fertig