Accidental-purchase / default-to-purchase UI
Purchase is the default or easily mis-tapped path, so spending happens without express, informed consent.
- Code
- M11
- Category
- Monetary & randomised
- Severity
- High
- Evidence
- StrongDocumented in 3D/UGC player-perception work and consumer-protection enforcement.
- Purpose served
- Serves businessPrimarily serves the provider's revenue, retention, or data — the most suspect.
- Mechanism family
- Interface interference
- Platforms
- Mobile / F2P · Children's apps · UGC platforms
- Player costs
- FinancialAutonomy / choice
- Target Audience
- children parentsdevelopers
- Tags
- default to purchaseaccidental purchasechildrenconsentserves businesscommercialized to childrendeceptive communicationlow transparencyconsent underminedmonetary pressurecognitive pressureugc platformsvulnerability exploitation
- Also known as
- mis-tap purchases, buy-by-default
How it works
Buy buttons sit where ‘continue’ usually is, confirmation is minimal, and stored payment makes a tap a charge.
Why it can be harmful
It manufactures purchases the player did not intend — a consent failure that has drawn major regulatory action, and is acute for children.
Examples in the wild
- A 'claim reward' button that actually buys currency
- One-tap in-game purchases with no meaningful confirmation
Illustrative genre examples to aid recognition — not allegations about specific titles.
References
- King, J. (2023). Investigating players' perceptions of deceptive design practices within a 3D gameplay context. Proceedings of the ACM on Human-Computer Interaction (CHI PLAY). doi.org/10.1145/3611053 · citing patterns
- Gray, C. M.; Santos, C. T.; Bielova, N.; Mildner, T. (2024). An ontology of dark patterns knowledge: Foundations, definitions, and a pathway for shared knowledge-building. Proceedings of the 2024 CHI Conference on Human Factors in Computing Systems. doi.org/10.1145/3613904.3642436 · citing patterns
Community catalogue
The community site DarkPattern.games catalogues a related pattern, “Accidental Purchases”, with 10+ example game mentions captured in our source crawl, including Life Makeover, My Leisure Time, Tears of Themis, Cookie Run: Kingdom.
Community-contributed and votes-based; the listed game titles are page-level examples from that catalogue, not a full game-profile crawl or our assessment. View on DarkPattern.games →
Related patterns
Language inaccessibility / complex copy
Important purchase, privacy, odds, or consent information is presented in language the player cannot reasonably understand.
Bad defaults / preselection
The provider-preferred option is already selected or treated as the normal path, so inaction becomes consent, spending, or data sharing.
Trick wording / misleading copy
Confusing, ambiguous, or expectation-violating wording makes the player take an action they did not mean to take.
Disguised ads / content
Ads are styled as gameplay or rewards so the player cannot tell promotion from play.
Feedforward ambiguity / unclear consequences
The interface fails to make clear what a button, prompt, or action will actually do before the player commits.
Loot boxes / gacha
Paid, randomised reward containers whose contents — and often whose odds — are unknown before purchase.