Time fog / playtime opacity
Elapsed time and session length are concealed so players lose track of how long they have played.
- Code
- T4
- Category
- Temporal & attention
- Severity
- Medium
- Evidence
- EmergingPart of the newer attention-capture deceptive-design literature.
- Purpose served
- Serves businessPrimarily serves the provider's revenue, retention, or data — the most suspect.
- Mechanism family
- Sneaking / Hiding
- Platforms
- Mobile / F2P · Live-service
- Player costs
- Time / attention
- Modes
- Deceptive
- Target Audience
- developers
- Tags
- attention capturetimetransparencyserves businessdeceptive communicationlow transparencyconsent underminedtemporal pressurecognitive pressurevulnerability exploitation
- Also known as
- time fog, session-length opacity
How it works
The interface omits clocks, session timers, or stopping cues, keeping the player in a timeless flow.
Why it can be harmful
Hiding time obscures a material fact about the cost of play, degrading the player’s ability to self-regulate attention.
Examples in the wild
- No in-game clock or session timer
- Seamless level chaining with no natural stop
Illustrative genre examples to aid recognition — not allegations about specific titles.
References
- Monge Roffarello, A.; Lukoff, K.; De Russis, L. (2023). Defining and identifying attention capture deceptive designs in digital interfaces. Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems. doi.org/10.1145/3544548.3580729 · citing patterns
Related patterns
Comparison prevention
Making it hard to compare prices, odds, or options so players can't judge value.
Feedforward ambiguity / unclear consequences
The interface fails to make clear what a button, prompt, or action will actually do before the player commits.
Language inaccessibility / complex copy
Important purchase, privacy, odds, or consent information is presented in language the player cannot reasonably understand.
Hidden / undisclosed odds
The probability of outcomes in a paid randomised reward is withheld, buried, or hard to verify.
Hidden costs
The true cost of a purchase is revealed late, or never.
Value obfuscation / false narratives
What a purchase actually yields is misrepresented through framing or false comparison.