Keywords: Sunk Cost Fallacy, Video Game Design, Player Behaviour, Psychological Manipulation, Game Engagement, In-Game Purchases, World of Warcraft, Clash of Clans, Game Progression, Ethical Implications, Gaming Addiction, Monetization, Product Design, Long-term Game Commitments, Psychological Principles in Gaming, Behavioral Design, Cognitive Bias, Product Design Ethics, Game Design Psychology, Digital Wellbeing

Abstract

The sunk cost fallacy describes the human tendency to continue investing in a decision once resources — time, effort, or money — have already been committed, even when the rational choice would be to stop. In video game design, this bias is deliberately reinforced through progression systems, monetization loops, and event-driven content that compel players to justify past investment by playing longer or spending more. This paper explores how sunk cost dynamics operate within product design frameworks and how their exploitation influences player psychology, engagement, and ethical considerations for sustainable game design.

Introduction

In behavioral economics, the sunk cost fallacy was formally defined by Arkes and Blumer (1985) as a cognitive bias leading individuals to persist in failing endeavors due to prior investment. In gaming, it is embedded deep within the user experience architecture — a self-reinforcing loop where time equals value and value equals obligation.

Progression systems, collectible rewards, and incremental upgrades ensure that every session feels like an investment toward a future payoff. The more a player commits, the more psychologically expensive it becomes to disengage. As a result, many users stay not out of enjoyment but to “protect” previous effort. In this way, game design becomes not just an entertainment medium but an economy of justification.

Mechanics of Investment Retention

1. Progression Systems and Leveling Loops
Every hour invested into a game generates measurable progress: experience points, badges, skill trees, and item unlocks. Designers create these metrics to signal ownership and progress, but they also build psychological inertia. A player who’s reached level 80 in a live-service game feels a deeper obligation to continue than one at level 8 — even if enjoyment has diminished.

2. Virtual Ownership and Identity
Avatars, skins, achievements, and purchased cosmetics represent symbolic investments of time and self. Losing access or abandoning a game means abandoning part of one’s constructed identity. This is particularly visible in online RPGs and shooters where cosmetic progression becomes a public narrative of personal history.

3. Event Chains and Reward Debt
Many games introduce multi-day or cumulative challenges — rewarding consistency rather than isolated success. Breaking a streak or skipping a day imposes psychological cost: the loss of an invisible debt that only continued participation can repay. This transforms leisure into duty, reinforcing engagement through guilt and perceived incompletion.

Case Studies: Sunk Cost in Modern Game Design

1. World of Warcraft (Blizzard Entertainment, 2004)

World of Warcraft is a case of investment-based retention. Players spend time developing characters, crafting gear, and collecting rare items. The subscription model may amplify sunk-cost reasoning: some players may feel that stopping would waste money already paid. A rational renewal decision, however, should depend on expected future enjoyment and costs rather than past payments.

2. Clash of Clans (Supercell, 2012)

This mobile strategy game transforms time and effort into village progress. As players build and upgrade, every improvement represents past investment. Some players may feel that abandoning the game would waste that investment. Time-gated upgrades may encourage sunk-cost reasoning when players continue solely to justify time already spent waiting, even though the remaining costs exceed the expected future benefits.

3. Genshin Impact (miHoYo, 2020)

In Genshin Impact, sunk cost manifests through character leveling, artifact enhancement, and the gacha system. Players who invest heavily in obtaining and upgrading rare characters often continue playing — even when dissatisfied — to validate their prior spending. The fallacy is deepened by narrative and social elements: characters tied to emotional storylines encourage psychological attachment beyond gameplay utility.

4. Ultimate Team in FIFA and EA SPORTS FC (Electronic Arts; FIFA branding through FIFA 23, EA SPORTS FC from 2023)

FIFA’s card-collecting system creates compounding commitment. Each season, players rebuild rosters, re-purchase packs, and re-invest time to maintain competitive standing. Despite resets, the illusion of progress persists — players justify continued spending because of the “time already put in.” This exemplifies how recurring design resets preserve revenue through perpetual sunk cost re-engagement.

Implications for Player Behavior and Design Ethics

The sunk cost fallacy blurs the line between motivation and compulsion. By designing around incremental investment, developers create retention models that thrive on cognitive dissonance: players stay because quitting feels like losing. Over time, this fosters dependency cycles, burnout, and frustration disguised as dedication.

Ethically, designers face a crucial question: how to sustain engagement without exploiting cognitive bias? Responsible game design acknowledges emotional investment as real currency and integrates mechanics that reward mastery, not mere persistence. Encouraging reflection (“You’ve achieved enough for today”) and introducing closure points can counterbalance exploitation. Games designed with voluntary stopping cues respect autonomy while preserving long-term loyalty.

Ethical Design Recommendations

• Transparency: Make progression systems and cost structures visible. Avoid hidden multipliers that inflate perceived investment.
• Closure Mechanics: Introduce satisfying endpoints (story arcs, season breaks) to provide psychological resolution.
• Investment Awareness: Educate players on cumulative time and spending — use dashboards to visualize personal input without shame.
• Fair Monetization: Decouple emotional continuity from financial obligation; allow play without pay after significant investment.
• Sustainability: Design rest phases or “opt-out” periods that reward return rather than punish absence.

Conclusion

The sunk cost fallacy remains one of the most insidious psychological levers in contemporary game design. Its appeal is subtle: it doesn’t demand attention — it traps it. By binding progress to persistence, designers convert time into loyalty and loyalty into revenue. Yet, ethical product design must transcend exploitation.

True innovation lies in systems that recognize completion, closure, and choice. When players can leave without guilt and return without penalty, engagement becomes sustainable. The next generation of behavioral design will be defined not by how long players stay, but by how freely they choose to come back.

This article is part of a broader research series on behavioral manipulation in digital products.

For a comprehensive theoretical framework, see:

Engineering Behavior: Psychological Manipulation in Digital Products

Sunk Cost Fallacy

Game Design

UX

Ux Strategy

UX Design