Summary
Plants vs. Zombies (2009) is a landmark casual strategy game often studied for clarity, pacing, and how it layers complexity onto a highly readable core. It is one of Bycer’s notable examples of design teaching through gradual escalation and approachable systemic play. (Bycer, 20 Essential Games to Study, see source-20-essential-games-to-study)
Design Concepts Illustrated
Related
smooth-learning-curves | player-guidance | source-20-essential-games-to-study