Leveling up mechanics

1. Game Balance vs Fair Play (Gamification Achievement Systems Tips)
2. Game Achievements vs Player Achievements (Gamification Player Progression Tips)
3. Game Characters vs Game Avatars (Gamification Achievement Systems Tips)
4. Game Sequel vs Game Expansion (Player-Centric Gamification Tips)
5. Player Skills vs Player Abilities (Gamification Achievement Systems Tips)
6. Player Achievement vs Player Advancement (Gamification Player Progression Tips)
7. Player Identification vs Player Authentication (Gamification Achievement Systems Tips)