Unlockable content incentives

1. Player Goals vs Game Objectives (Gamification Player Progression Tips)
2. Player Actions vs Player Behavior (Gamification Player Progression Tips)
3. Player Status vs Player Reputation (Gamification Achievement Systems Tips)
4. Skill Mastery vs Skill Leveling (Gamification Player Progression Tips)
5. Game Levels vs Player Levels (Gamification Player Progression Tips)