This document discusses gamification and different types of players. It begins by defining gamification as using game mechanics to encourage engagement in activities that may otherwise be boring. It notes that not all games are fun and well-designed games are fun. The document outlines Richard Bartle's classification of player types in multiplayer games, including killers who like imposing on others, achievers focused on points/levels, socializers who use games for socializing, and explorers who like exploring the game world.