Quest completion

1. Farming vs Grinding (Virtual Economy Gamification Tips)
2. Player Rewards vs Player Achievements (Gamification Player Progression Tips)
3. Game Playability vs Game Accessibility (Gamification Achievement Systems Tips)
4. Game Scores vs Player Scores (Gamification Player Progression Tips)
5. Player Stages vs Game Stages (Gamification Player Progression Tips)
6. Progression System vs Achievement System (Gamification Player Progression Tips)
7. Skill Progression vs Level Progression (Gamification Achievement Systems Tips)
8. Game Difficulty vs Challenge Difficulty (Gamification Achievement Systems Tips)
9. Game Progression vs Game Advancement (Gamification Player Progression Tips)