Daily challenges

1. Single-Player Achievements vs Multiplayer Achievements (Gamification Achievement Systems Tips)
2. Game Adventure vs Game Quest (Gamification Achievement Systems Tips)
3. Game Scenario vs Player Scenario (Gamification Player Progression Tips)
4. Player Control vs Player Autonomy (Gamification Player Progression Tips)
5. Player Experience (PX) vs Player Interaction (PI) (Gamification Achievement Systems Tips)
6. Player Progress vs Game Progress (Gamification Player Progression Tips)
7. Player Status vs Player Reputation (Gamification Player Progression Tips)
8. Social Features vs Multiplayer Features (Player-Centric Gamification Tips)