Randomness factor

1. Player Experience vs Player Engagement (Gamification Achievement Systems Tips)
2. Game Complexity vs Game Difficulty (Gamification Achievement Systems Tips)
3. Game Physics vs Game Mechanics (Player-Centric Gamification Tips)
4. Gameplay Mechanics vs Player Mechanics (Gamification Player Progression Tips)
5. Skill-Based Games vs Chance-Based Games (Player-Centric Gamification Tips)
6. Martingale Strategy Gotchas (Hidden Dangers)