Cost Types

Cost Types

1. Arithmetic Cost (Linear Growth)

Formula: STARTING_COST + LEVEL * INCREASE_COST_BY

Arithmetic cost increases by a fixed amount each level, creating a linear progression. This results in predictable, steady cost increases.

Example:

• Starting Cost: 100

• Increase Cost By: 50

• Level 1: 100 + 1 × 50 = 150

• Level 2: 100 + 2 × 50 = 200

• Level 3: 100 + 3 × 50 = 250

2. Exponential Cost (Exponential Growth)

Formula: STARTING_COST * EXPONENTIAL_GROWTH^LEVEL

Exponential cost multiplies by a growth factor each level, creating rapid cost acceleration. This creates increasingly expensive upgrades at higher levels.

Example:

• Starting Cost: 100

• Exponential Growth: 1.5

• Level 1: 100 × 1.5¹ = 150

• Level 2: 100 × 1.5² = 225

• Level 3: 100 × 1.5³ = 337.5

Configuration

Arithmetic Cost Configuration

currency: "coins"           # Currency type to use
starting-cost: 100.0       # Base cost at level 0
increase-cost-by: 50.0     # Amount to add per level
remove-currency: true      # Whether to deduct currency from player

Exponential Cost Configuration

currency: "gems"           # Currency type to use
starting-cost: 100.0       # Base cost at level 0
exponential-growth: 1.5    # Multiplier per level (must be > 1.0)
remove-currency: true      # Whether to deduct currency from player
is-exponential: true       # Set to true for exponential cost