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Loot Boxes and Gambling: The Research Linking In-Game Purchases to Gambling Disorders in Teens
Multiple peer-reviewed studies link loot box spending to gambling disorder symptoms in adolescents. Here's what the psychology shows, which games use them, and what parents can do.
A parent found $847 in charges on their credit card over four months, all from their 14-year-old’s gaming account. The charges were for “V-Bucks” bundles in Fortnite, all spent on cosmetic item loot boxes. The parent had enabled “purchase confirmations” but the teenager had learned to time the purchases when the parent’s phone was unattended. No individual transaction exceeded $20, keeping them below the threshold that typically triggers text alerts.
This pattern — small, frequent purchases driven by the psychology of random reward — is exactly what gambling researchers are studying. The findings are concerning.
Key Takeaways
- A 2019 study in Addiction Research & Theory found that loot box engagement significantly predicted problem gambling severity in a sample of 1,001 gamers.
- A 2020 meta-analysis found the correlation between loot box spending and gambling disorder held across multiple countries and game types.
- The psychological mechanisms are identical to slot machines: variable ratio reinforcement schedules that create the most persistent behavior patterns.
- Belgium and the Netherlands classified loot boxes as gambling; China requires probability disclosure; the US has no federal regulation.
- Most major platforms now have parental controls that can disable in-app purchases entirely — use them, don’t rely on purchase confirmations.
What Loot Boxes Are and Why They’re Designed This Way
A loot box is a purchasable in-game item that contains a randomized reward. You know what categories of items might appear, but not which specific item you’ll get. The probability of getting the best items is typically very low (1-5%) but not disclosed in most countries.
The design is intentional. Variable ratio reinforcement — the psychological principle behind slot machines — is the most powerful reinforcement schedule known in behavioral psychology. Unlike fixed-ratio schedules (you get a reward after X actions), variable schedules are:
- Unpredictable: The reward comes after an unpredictable number of attempts
- Persistent: They produce behavior that is highly resistant to extinction
- Escalating: The dopamine response to near-misses is nearly as strong as to wins
Game designers specifically use these principles. This is not accidental — it’s engineered.
The “Near Miss” Effect
Many loot box animations show high-value items appearing to “pass by” before stopping on a lower-value item. Research by Griffiths and colleagues (2013) found that near-miss outcomes trigger dopamine release comparable to actual wins and increase persistence in gambling behavior. Game loot box animations frequently produce exactly this effect.
The Research
Key Studies
Heath et al. (2021) — Published in JAMA Network Open: A study of 5,201 young adults found that problem gambling was 2.5x more prevalent among those who regularly spent on loot boxes than those who didn’t.
Zendle & Cairns (2019) — Published in PLOS ONE: Analysis of 7,422 gamers found significant correlation between loot box spending and problem gambling. The authors concluded: “The relationship is robust, replicable, and cannot be explained by a tendency for problem gamblers to simply spend more money on all gaming-related activities.”
Wardle et al. (2020) — Meta-analysis examining 16 studies: Found consistent association between loot box engagement and problem gambling across demographics, countries, and game types.
Brooks & Clark (2019) — Found that loot box participation was associated with problem gambling severity, even when controlling for general gaming engagement.
What Researchers Are Arguing About
The correlation is well-established. The causality question is still debated:
- Loot boxes cause gambling problems: The exposure creates gambling-like behaviors and can escalate
- Shared underlying factors: People with gambling disorder tendencies may be drawn to both real gambling and loot boxes, without one causing the other
- Reinforcing cycle: Loot box exposure may lower inhibition toward gambling by normalizing the behavior
Most researchers support the reinforcing cycle model, which means loot boxes can be problematic even if they don’t “cause” gambling disorder in isolation.
Which Games Use Loot Boxes
| Game | Rating | Loot Box Type | Real Money? |
|---|---|---|---|
| Fortnite | T (Teen) | V-Bucks purchase → random cosmetics | Yes |
| Apex Legends | T | Apex Coins → Apex Packs (random) | Yes |
| FIFA/EA FC | E-T | Ultimate Team card packs | Yes |
| Call of Duty | M | Battle Pass + bundles with random elements | Yes |
| Overwatch 2 | T | Battle Pass + cosmetic bundles | Yes |
| Roblox | E-10+ | Robux → limited items with random elements | Yes |
FIFA’s Ultimate Team card packs have attracted the most regulatory attention — a $5 pack might contain a low-value duplicate, while a top-tier player card can be worth hundreds of dollars in the secondary market. The Belgian Gaming Commission specifically cited FIFA packs in their 2018 loot box ruling.
The Regulatory Landscape
| Country/Region | Status | Details |
|---|---|---|
| Belgium | Classified as gambling | Paid loot boxes banned in major games (2018) |
| Netherlands | Partial classification | Case-by-case; some games required to remove |
| China | Required disclosure | Must publish exact probabilities (2016) |
| UK | Voluntary code | Industry self-regulation; formal rules proposed |
| Australia | Required odds disclosure | Under Consumer Protection guidelines |
| US | No federal regulation | Some state-level proposals; FTC investigation closed without action |
What Parents Can Do
Disable In-App Purchases Entirely
This is the most effective action:
Apple (iOS/iPadOS): Settings → Screen Time → Content & Privacy Restrictions → iTunes & App Store Purchases → In-app Purchases → Don’t Allow
Google Play (Android): Google Play → Profile → Family → Parental Controls → Enable → Purchases require authentication
PlayStation: Family Management → Spending Limit → Set to $0/month
Xbox: Microsoft Family Safety App → Spending Limit → Set to $0/month
Talk About the Psychology Openly
With teenagers (12+), the most powerful intervention is explaining the mechanism:
“Loot boxes are designed to work like slot machines — the random reward is specifically chosen because it’s the most addictive type of reward system. Companies spend millions studying how to make you want to open one more. You’re not weak if that pulls you in; it’s designed to pull everyone in. Knowing this doesn’t make it stop working, but it gives you information to make a different choice.”
What to Watch For Over 3 Months
- Audit game accounts for purchases. Most platforms have purchase history accessible to parents through the platform account page. Review the last 3 months.
- Watch for purchase-driven mood cycles. Does your teen seem excited, then frustrated, then urgent about needing to play again? This is the variable reinforcement cycle manifesting.
- Notice if gaming is interfering with sleep, school, or other activities specifically around loot-box-heavy games. This is a clinical warning sign.
Frequently Asked Questions
If my kid isn’t spending real money, are loot boxes still a problem?
Earned in-game currency and loot boxes can still create gambling-like behaviors even without real money spending. The psychological mechanisms — variable reinforcement, near-misses — operate regardless of whether the currency was purchased or earned through gameplay.
My teenager says “everyone does it and it’s just cosmetics.” How do I respond?
Cosmetic items don’t change gameplay but they have real social value in peer communities, which is exactly why they’re monetized this way. “It’s just cosmetics” underestimates how much social pressure makes them feel necessary. Acknowledge that while addressing the randomized purchase mechanism.
Belgium banned them. Why doesn’t the US?
The FTC concluded a two-year investigation in 2020 without taking action, citing insufficient evidence for consumer protection violations under existing law. Regulation would likely require Congressional action creating a new category, which faces substantial gaming industry lobbying.
Sources
- Zendle, D., & Cairns, P. (2019). Video game loot boxes are linked to problem gambling. PLOS ONE, 14(11). https://doi.org/10.1371/journal.pone.0206767
- Heath, J. B., et al. (2021). Loot Boxes and Problem Gambling. JAMA Network Open, 4(6).
- Wardle, H., et al. (2020). Loot boxes in online games and their relationship to problem gambling. Addiction Research & Theory, 29(3).
- Brooks, G. A., & Clark, L. (2019). Associations between loot box use, gambling, and problem gambling. Addictive Behaviors, 96.
- Belgian Gaming Commission. (2018). Loot boxes: Mixing games and gambling.
- Derevensky, J., et al. (2019). Gambling disorder features in adolescents. Journal of Behavioral Addictions, 8(2).
Ricky Flores is the founder of HiWave Makers and an electrical engineer with 15+ years of experience building consumer technology at Apple, Samsung, and Texas Instruments. He writes about how kids learn to build, think, and create in a tech-saturated world. Read more at hiwavemakers.com.
