Purchased with real money

  1. Economic Impact vs Game Impact (Virtual Economy Gamification Tips)
  2. In-Game Currency vs Premium Currency (Player-Centric Gamification Tips)
  3. Virtual Items vs In-Game Items (Gamification Achievement Systems Tips)
  4. Premium Currency vs Free Currency (Virtual Economy Gamification Tips)
  5. Tradable vs Sellable (Virtual Economy Gamification Tips)
  6. Market Economy vs Virtual Economy (Virtual Economy Gamification Tips)
  7. Capital vs Resources (Virtual Economy Gamification Tips)
  8. Virtual Goods vs Digital Goods (Player-Centric Gamification Tips)
  9. Virtual Budget vs Game Budget (Virtual Economy Gamification Tips)
  10. Tradable Items vs Non-Tradable Items (Virtual Economy Gamification Tips)
  11. Offline Games vs Online Games (Player-Centric Gamification Tips)
  12. Game Respawn vs Game Revive (Player-Centric Gamification Tips)
  13. Gameplay Elements vs Game Features (Gamification Achievement Systems Tips)
  14. Game Balance vs Fair Play (Gamification Achievement Systems Tips)
  15. Economic Environment vs Virtual Environment (Virtual Economy Gamification Tips)
  16. Player Economy vs Developer Economy (Virtual Economy Gamification Tips)
  17. Virtual Property vs Physical Property (Virtual Economy Gamification Tips)