In-game tutorials

1. Game Playability vs Game Accessibility (Gamification Achievement Systems Tips)
2. Player Abilities vs Player Powers (Gamification Player Progression Tips)
3. Skill Levels vs Player Levels (Gamification Player Progression Tips)
4. Gameplay Evolution vs Player Evolution (Gamification Player Progression Tips)
5. Game Tasks vs Player Tasks (Gamification Player Progression Tips)
6. Skill-Based Games vs Chance-Based Games (Player-Centric Gamification Tips)