Non-linear gameplay
- Gameplay vs Game Plot (Player-Centric Gamification Tips)
- Game Unlockables vs Game Achievements (Gamification Achievement Systems Tips)
- Leveling Up vs Ranking Up (Gamification Player Progression Tips)
- Open World vs Closed World (Player-Centric Gamification Tips)
- Player Participation vs Player Contribution (Gamification Achievement Systems Tips)
- Skill Progression vs Ability Progression (Gamification Player Progression Tips)