S+ Tier

Auto MergeTime SaveAuto-combines identical nukes. The single most critical asset for maximizing offline yield and eliminating manual drag-and-drop grinding.Quick Lock CooldownDefenseReduces the 20-minute Base Lock cooldown. Best impulse-buy value in the entire store.

S Tier

x2 Spawn SpeedTime SaveDoubles the baseline accumulation rate. Mathematically halves time-to-next-tier.x2 Nuke HealthDefenseDoubles HP of every deployed nuke. Ensures high-tier assets survive incoming enemy strikes long enough to be merged or launched.

A Tier

Quick Nuke CooldownOffenseReduces cooldown between launches. Enables aggressive city raid farming.

C Tier

x2 CashRemovedHistorically doubled all cash generation. Pulled off sale as an anti-inflationary measure.Skip CooldownRemovedBypassed all cooldown timers. Removed to preserve PvP loop integrity.