The document identifies four keys to creating emotion in games without relying on cutscenes or explicit storytelling: 1. Hard Fun - Generating emotions like frustration and accomplishment through meaningful challenges, strategies, and puzzles. 2. Easy Fun - Grabbing attention through ambiguity, incompleteness, and detail to create emotions like wonder and mystery. 3. Altered States - Stimulating senses and behaviors to produce emotions like excitement and relief from changes in mental state. 4. The People Factor - Enabling social experiences through competition, cooperation and spectacle to create emotions like amusement and schadenfreude.