Social competition

1. Player Ranking vs Player Rating (Gamification Achievement Systems Tips)
2. Pygmalion Effect: Expectations Vs. Performance (Unveiled)
3. Achievements vs Trophies (Gamification Achievement Systems Tips)
4. Game Rewards vs Real-World Rewards (Gamification Achievement Systems Tips)
5. Game Unlockables vs Game Achievements (Gamification Achievement Systems Tips)
6. Player Interaction vs Player Collaboration (Gamification Achievement Systems Tips)
7. Session Length vs Play Time (Player-Centric Gamification Tips)