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Players Making Decisions: Game Design Essentials and the Art of Understanding Your Players

4 min read

Source metadata

  • Type: Textbook
  • Author: Zack Hiwiller
  • Publisher: New Riders (Pearson), 2016
  • Scope: 481 pages, 34 chapters across 8 parts. Broad introductory-to-intermediate textbook on game design, with unusually strong coverage of game theory, behavioural psychology, and quantitative tools (probability, spreadsheets, Monte Carlo simulation).

Key takeaways

  • The Fundamental Game Design Directive: Keep players making interesting decisions. This is Hiwiller’s central claim — the primary job of the game designer is to create conditions for meaningful decision-making, and flow is the psychological state associated with doing so well.
  • Decision taxonomy: Distinguishes blind, obvious, meaningless, misleading, and handcuffing decisions as anti-patterns; trade-offs and informed decisions with real consequences as the positive pattern.
  • Anatomy of a choice (Salen & Zimmerman via Hiwiller): Five diagnostic questions — Before, Communication, Action, Consequences, Feedback — form a practical framework for auditing any in-game decision.
  • Randomness as a design tool: Neither good nor bad intrinsically; the skill/luck spectrum and player perception of fairness determine its effect. Randomness should be designed for, not left to chance.
  • Game theory applied to games: Rigorous coverage of Nash equilibria, Prisoner’s Dilemma, zero-sum games, and dominant strategies — treated as practical design tools, not just academic frameworks.
  • Behavioural psychology: Reinforcement schedules (Skinner), operant conditioning, and the “extinction” problem are applied directly to reward design and engagement.
  • Human cognitive biases: Anchoring, loss aversion, prospect theory, and decision heuristics from Kahneman/Tversky applied to how players actually make choices in games.
  • Quantitative design: Probability, spreadsheet simulation, and Monte Carlo methods treated as core competencies for game designers — not optional extras.

Notable claims

“Randomness for the game designer is like salt for a chef. Sometimes you want to prepare something a bit salty. Sometimes adding salt only hurts the dish.” — Hiwiller, Ch. 11

“The single most useful technique for making a decision interesting, hands down, is introducing a trade-off.” — Hiwiller, Ch. 10

“More agency is not necessarily better. The key is to give the player agency only for decisions he cares about and those that effectively serve the experience that the designers wish to create.” — Hiwiller, Ch. 10

“The variable ratio is what most slot machine designers use. It causes the greatest amount of activity. When the rats do not know when the food pellet is coming, they push the lever furiously.” — Hiwiller, Ch. 23

On Sid Meier’s Civilization finding: players with a 3:1 army advantage expected never to lose a battle, but with a 1:3 disadvantage expected to win 25% of battles — demonstrating asymmetric fairness perception.

Relevance

This source primarily informs:

  • Decision-making and player agency — Hiwiller’s central concern; adds decision taxonomy and anatomy of a choice framework
  • Flow — Extends existing coverage with Jenova Chen’s MFA thesis, the “Fundamental Game Design Directive” framing, and casual/hardcore positioning on the challenge/skill axis
  • Randomness — Creates an entirely new topic not previously covered in the wiki
  • Game theory — Creates an entirely new topic not previously covered
  • Reward systems — Adds Skinner/operant conditioning detail, extinction concept, and behavioural mechanism behind variable ratio schedules
  • Cognitive biases — New depth on how players actually make decisions (anchoring, loss aversion, prospect theory)
  • Playtesting and prototyping — Practical paper prototyping techniques, A/B testing, InDesign data merge for cards
  • Production and documentation — GDD creation process, risk analysis in pitches, presentation design
  • Game balance — Marginal decision analysis as a balancing technique

Open questions raised

  • When is opaque DDA preferable to transparent DDA? Hiwiller cites Jenova Chen’s flOw as an explicit DDA implementation — does making the system visible reduce or enhance its effect?
  • Hiwiller covers game theory as if players reason rationally, then dedicates Ch. 21 to dismantling that assumption. What does this mean for designers who use game theory to predict player behaviour?
  • The variable ratio schedule is the most engaging and the most ethically concerning reinforcement pattern. Hiwiller acknowledges this tension but does not resolve it — where is the line?

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