Premium currency
- Premium Currency vs Free Currency (Virtual Economy Gamification Tips)
- In-Game Currency vs Premium Currency (Player-Centric Gamification Tips)
- Gameplay Elements vs Game Features (Gamification Achievement Systems Tips)
- Virtual Property vs Physical Property (Virtual Economy Gamification Tips)
- Game Respawn vs Game Revive (Player-Centric Gamification Tips)
- Game Wealth vs Virtual Wealth (Virtual Economy Gamification Tips)
- Virtual Budget vs Game Budget (Virtual Economy Gamification Tips)
- Game Economy vs Virtual Economy (Gamification Achievement Systems Tips)
- Leveling Up vs Ranking Up (Gamification Player Progression Tips)
- Player Rewards vs Player Achievements (Gamification Player Progression Tips)
- Player Transactions vs In-Game Transactions (Virtual Economy Gamification Tips)