Loot boxes / gacha
Paid, randomised reward containers whose contents — and often whose odds — are unknown before purchase.
- Code
- M1
- Category
- Monetary & randomised
- Severity
- Severe
- Evidence
- StrongReplicated, meta-analytic correlation with problem gambling; effect stronger in adolescents.
- Purpose served
- Gameplay & businessServes play and the provider at once — the contested middle where context decides whether it's deceptive.
- Mechanism family
- Monetary / randomised
- Platforms
- Mobile / F2P · PC / console · Live-service
- Harm vectors
- FinancialEmotional / psychological
- Also known as
- gacha, card packs, prize crates, surprise mechanics
How it works
Players spend real money (often via an intermediate premium currency) for a randomised draw. Variable-ratio reinforcement and near-miss framing encourage repeat purchases, and ‘pity’ counters extend the spend cycle.
Why it can be harmful
The structure is psychologically akin to gambling and shows a robust, replicated correlation with problem gambling — strongest among adolescents — with revenue concentrated in a small share of high-spenders. It is the clearest case of exploitation that persists even when fully transparent.
Examples in the wild
- Gacha 'banners' in mobile RPGs with rate-up characters
- Card or skin packs bought with premium currency
- Sports-title player packs in 'ultimate team' modes
Illustrative genre examples to aid recognition — not allegations about specific titles.
References
- King, D. L.; Delfabbro, P. H. (2018). Predatory monetization schemes in video games (e.g. 'loot boxes') and internet gaming disorder. Addiction. doi.org/10.1111/add.14286 · citing patterns
- Drummond, A.; Sauer, J. D. (2018). Video game loot boxes are psychologically akin to gambling. Nature Human Behaviour. doi.org/10.1038/s41562-018-0360-1 · citing patterns
- Zendle, D. (2020). Beyond loot boxes: A variety of gambling-like practices in video games are linked to both problem gambling and disordered gaming. PeerJ. doi.org/10.7717/peerj.9466 · citing patterns
- Garea, S. S.; Drummond, A.; Sauer, J. D.; Hall, L. C., et al. (2021). Meta-analysis of the relationship between problem gambling, excessive gaming and loot box spending. International Gambling Studies. doi.org/10.1080/14459795.2021.1914705 · citing patterns
- Spicer, S. G.; Nicklin, L. L.; Uther, M.; Lloyd, J., et al. (2021). Loot boxes, problem gambling and problem video gaming: A systematic review and meta-synthesis. New Media & Society. doi.org/10.1177/14614448211027175 · citing patterns
Community catalogue
The community site DarkPattern.games catalogues a related pattern, “Gambling / Loot Boxes”, with 10+ example game mentions captured in our source crawl, including Dye Hard - Color War, Hatch Dragons, SUMI SUMI : Matching Puzzle, Paper.io 2.
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
Creator tipping & crowdfunded content
Routing real money to creators or crowdfunding unreleased content, where prosocial “support” framing lowers price scrutiny.
Optimism & frequency bias
Framing that inflates perceived chances of winning — emphasising wins and near-misses, downplaying losses — to exploit optimism and frequency illusions.
Pay-for-early-access
Selling early access to content, weapons, or updates so patience becomes a purchasable advantage.
Pay-to-win
Purchasable power converts money into competitive advantage, undermining the implicit contract of skill.
Power creep
Continually releasing more powerful paid items so previously bought ones become obsolete, pressuring repeat purchases to keep up.
Variable-ratio reward / near-miss
Slot-machine-like reinforcement and 'almost won' framing drive repeated attempts.