Incentive mechanism

1. Power-Ups vs Boosters (Player-Centric Gamification Tips)
2. Virtual Reality (VR) Games vs Augmented Reality (AR) Games (Player-Centric Gamification Tips)
3. Player Challenges vs Game Challenges (Gamification Achievement Systems Tips)
4. Public Achievements vs Private Achievements (Gamification Achievement Systems Tips)
5. Productivity Boosters: Virtual Economy Vs. Social Influence (Compared)