I’ll help you design a **Bison Rising Megaways Bonus Slot** concept. This will be a theoretical game design combining the popular Megaways mechanic with a bison/wilderness theme and engaging bonus features.

## **Game Overview**
**Title:** Bison Rising Megaways
**Theme:** American wilderness, majestic bisons, golden sunsets
**Reels:** 6 reels with Megaways (2-7 symbols per reel, up to 117,649 ways)
**Volatility:** High
**RTP:** 96.5%
**Features:** Cascading wins, free spins, mystery symbols, progressive multipliers, bonus buy option

—

## **SYMBOL SET**

### **Low-Pay Symbols** (Card Royals)
– 10, J, Q, K, A (Wilderness-styled with wood/bone carvings)

### **High-Pay Symbols**
– **Wolf** (4x bet for 6OAK)
– **Eagle** (5x bet for 6OAK)
– **Bear** (6x bet for 6OAK)
– **Bison** (10x bet for 6OAK)

### **Special Symbols**
– **Wild Symbol** (Golden Sunset): Substitutes for all except bonus
– **Bonus Symbol** (Totem Pole): 3+ anywhere triggers free spins
– **Mystery Symbol** (Golden Paw Print): Transforms into any regular symbol

—

## **BONUS FEATURES**

### **1. CASCADING WINS**
– Winning symbols explode, new symbols cascade down
– Each cascade increases a **progressive multiplier** (+1 per cascade)
– Multiplier resets after no win

### **2. MYSTERY SYMBOLS**
– Golden paw prints land randomly
– Reveal as identical regular symbols (all paw prints become same symbol)
– Can trigger massive cluster wins

### **3. FREE SPINS BONUS** (Bison Stampede)
– **Trigger:** 3+ bonus symbols anywhere
– **Starting spins:** 8 free spins
– **Special feature:** Bison symbols become **sticky wilds** during bonus
– **Progressive multiplier** does NOT reset between spins
– **Retrigger:** 2+ bonus symbols award +3 spins

### **4. BISON CHARGE FEATURE** (Random)
– Randomly triggers on any non-winning spin
– 1-3 bison symbols charge across reels, turning positions wild
– Can create instant wins from losing spins

### **5. SUNSET RESPIN FEATURE**
– When 2 bonus symbols land but not 3
– Bonus symbols lock, other reels respin once
– Chance to complete bonus trigger

### **6. BUY BONUS OPTION**
– Instant access to free spins: 80x bet
– RTP maintained in bonus buy

—

## **MEGAWAYS MECHANIC ADAPTATIONS**

### **Dynamic Ways**
– Each reel independently changes height every spin (2-7 symbols)
– **Antelope Trail Feature:** Occasionally, reels 2-5 lock at 7 symbols for 1 spin
– **Maximum ways:** 117,649 (7^6)

### **Ways to Win Calculation**
– Count matching symbols on consecutive reels starting from left
– Each symbol on a reel counts as 1 way if at least 1 matching symbol on next reel

—

## **VISUAL & AUDIO DESIGN**

### **Visual Elements:**
– Animated bison herd in background
– Day-to-night cycle during big wins
– Mountain range backdrop with moving clouds
– Particle effects for cascades (gold dust, feathers)

### **Animations:**
– Bison symbols animate when part of wins (stomp, charge)
– Eagle symbol flies across screen during big wins
– Totem poles light up when bonus triggers

### **Sound Design:**
– Epic western/orchestral soundtrack
– Nature sounds (wind, distant animal calls)
– Drum rolls during cascade chains
– Victory fanfare for bonus triggers

—

## **THEORETICAL MATH MODEL**

### **Base Game Hit Frequency:** 22%
### **Bonus Frequency:** 1 in 150 spins
### **Max Win Potential:** 25,000x bet
### **Feature Distribution:**
– Cascades: 65% of wins
– Mystery symbols: 15% of wins
– Bison Charge: 5% of spins
– Free spins: 0.67% of spins

—

## **PROGRESSIVE JACKPOT OPTION** (Optional)
**Great Plains Jackpot:**
– Mini: 50x bet
– Minor: 150x bet
– Major: 1,000x bet
– Grand: 10,000x bet
– Funded by 2% of each bet (adjusts RTP accordingly)

—

## **UNIQUE SELLING POINTS**
1. **Sticky Wild Bisons** in free spins that remain for entire bonus
2. **Progressive multipliers** that persist through free spins
3. **Mystery symbol clusters** for surprise big wins
4. **Rescue feature** (Bison Charge) turns losses into wins
5. **Visual spectacle** of stampeding bison animations

—

## **MOBILE OPTIMIZATION**
– Portrait and landscape modes
– Quick spin option
– Battery-saving graphics toggle
– One-handed tap controls

—

**Note:** This is a conceptual design for educational/creative purposes. Actual slot development requires:
1. Mathematical probability modeling
2. RNG certification
3. Compliance with gambling regulations
4. Professional software development
5. Licensing for target markets

Would you like me to elaborate on any specific aspect of this bonus slot design?