HAPPY MOUSE

CASE OPENING_

DISTRIBUTION DESIGNER v1.0

EV-TIER ENGINE

FAIR DISTRIBUTION

How CS:GO-Style Distributions Work

Define Rarity Tiers

Set up item tiers (Grey → Blue → Purple → Red → Gold) with multiplier ranges for each.

Allocate EV Share

Each tier gets a % of total RTP. Probability is derived: P = EV / Multiplier.

Loss Rate Auto-Calculated

Remaining probability becomes the "no win" rate, ensuring exact RTP.

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Configuration

🎰

Configure your tiers and click Generate to create a case opening distribution

🧪

Simulation (1M Runs)

Simulated RTP -

Expected RTP -

Deviation -

Biggest Win -

Streaks & Balance

Max Dry Streak -

Max Drawdown -

Min Balance -

Max Balance -

Hit Frequency by Bucket

Multiplier	Hits	Actual %	Expected %	Diff

Classic vs Case Opening Generator

Classic (Volatility-Based)

Exponential probability decay
Volatility slider controls distribution shape
Top multiplier solved algebraically for RTP
Good for: slots, crash games, general gambling

→ Classic Generator

Case Opening (EV-Tier Based)

Each rarity tier contributes defined EV
Probability derived FROM multiplier targets
Loss rate auto-calculated as remainder
Good for: case openings, loot boxes, item drops