Virtual currency rewards

1. Gameplay Achievements vs Social Achievements (Gamification Achievement Systems Tips)
2. Buying Power vs Spending Power (Virtual Economy Gamification Tips)
3. Game Adventure vs Game Quest (Gamification Achievement Systems Tips)
4. Player Experience vs Player Competence (Gamification Player Progression Tips)
5. Player Motivation vs Player Engagement (Gamification Player Progression Tips)
6. Social Gaming vs Competitive Gaming (Gamification Achievement Systems Tips)
7. Player Actions vs Player Behavior (Gamification Player Progression Tips)
8. Player Goals vs Game Objectives (Gamification Player Progression Tips)
9. Player Identification vs Player Authentication (Gamification Achievement Systems Tips)
10. Quests vs Missions (Gamification Player Progression Tips)