This document discusses strategies for designing successful idle games and limited time events within those games. It provides examples from Kongregate's idle games AdVenture Capitalist, Pocket Politics, and Office Space to illustrate design patterns around core gameplay loops, unlock systems, offline progression, events, leaderboards, character systems, and monetization strategies that increased player engagement and spending. Overall, the document advocates for event designs that introduce new puzzles and strategic options to motivate player behavior and drive lifts in key performance indicators.