Progression Systems

Hangar Shop (Score Currency)

Enemy kills earn score which is spent in the Hangar between missions.

Core Systems (Max Level 5)

SystemBase CostEffect Per Level
Turbine Engine1,000+10% speed & afterburner
Nano-Composite (Hull)1,500+10% health & handling
Missile Systems (Weapon)2,000+10% damage, -5% reload
Avionics Suite (Radar)1,200+10% radar range

Cost formula: baseCost × nextLevel. Engine level 1→2 costs 2,000.

Special Systems (Max Level 2)

SystemLvl 1 CostLvl 2 Cost
PDS Defense25,00050,000
Dual Drones25,00050,000
Quasar Wave25,00050,000
Missile Engineering25,00050,000

ZeroTree Skill Progression

Procedurally generated 9×7 skill tree (63 nodes) accessed from the Hangar. All node properties, edges, and costs derived from seed 0x5B455254 via FNV-1a hashing.

ZeroTree Apache 2.0

Skill Points

Earned on mission completion: 3 base + 1 per level number. Spent to unlock nodes. Full respec available with 30% tax.

6 Stat Types

StatEffectRange Per Node
Speed+N% maxSpeed / afterburner1-8%
Damage+N% weapon damage1-10%
Health+N% max health2-12%
Handling+N% turn rate1-6%
Reload-N% reload time1-5%
ArmorFlat damage reduction1-8

Bonuses stack multiplicatively with Hangar upgrade levels.

Nemesis System

Defeated enemies may spawn persistent nemesis pilots (15% chance) that return in future missions with escalating power and escort squads.

TierTitleHP MultDMG MultEscorts
1ROOKIE1.5x1.2x1 drone
2VETERAN2.0x1.5x2 fighters
3ACE3.0x2.0x2 fighters + 1 bomber
4ELITE ACE4.0x2.5x3 fighters + 1 bomber
5NEMESIS5.0x3.0xFull wing

Max 4 active nemeses. On player death the highest-tier nemesis is promoted. Callsigns and dialogue derived from seed via ZeroBytes.

Score Rewards

SourceScore
FIGHTER kill500
BOMBER kill1,000
ACE kill2,000
Time bonus (per second remaining)100

INBOX Narrative

Accessed from the Hangar menu via the INBOX button. A branching narrative with 5 characters, 4 binary choices, and 16 possible endings. New story threads unlock every 5 levels (levels 5, 10, 15, 20, 25). Choices persist to IndexedDB immediately — progress survives app close and restart.

See Missions & Game Modes for the full INBOX breakdown.

Persistence Summary

DataStorageSaved When
Player ScoreIndexedDBUpgrade purchase, level complete
Upgrade Levels (8 systems)IndexedDBPurchase, level complete
Current LevelIndexedDBLevel complete
Nemesis Records (up to 4)IndexedDBLevel complete, player death
ZeroTree BitmaskIndexedDBSkill tree changes
Skill PointsIndexedDBLevel complete
Narrative ChoicesIndexedDBImmediately on each choice
Quest Gates UnlockedIndexedDBLevel complete (every 5 levels)
Game SettingslocalStorageAny setting change