F2P Monetisation Design
Summary
F2P Monetisation Design refers to the set of frameworks and principles governing how free-to-play and live-service games generate revenue from players without requiring an upfront purchase price. Oscar Clark’s Games as a Service (Clark, 2014, see source-games-as-a-service) provides the most systematic practitioner treatment of this subject, covering virtual goods taxonomy, buyer psychology, pricing strategy, currency design, advertising models, and ethical constraints. The key argument throughout is that monetisation design must be built into the game experience rather than bolted on — and that the player’s enjoyment and trust are long-term commercial assets, not obstacles to revenue.
Key ideas
Virtual goods taxonomy
Clark identifies three categories of virtual good (Clark, Games as a Service, see source-games-as-a-service):
| Category | Definition | Examples |
|---|---|---|
| Consumable | One-time use; provides a temporary benefit and is then gone | Power-ups, health potions, energy refills, XP boosts (for one session) |
| Durable | Provides ongoing passive value over time; not consumed in a single use | A “Well of Energy Crystals” that generates a fixed number of crystals per day; a building that produces resources |
| Permanent | A one-time upgrade that persists indefinitely | New character, extra inventory slot, cosmetic item, ability unlock |
Durable goods are particularly interesting commercially because they provide recurring perceived value without being destroyed on use. Clark’s “Well of Energy Crystals” example: a well that generates 12 units per day at level 1 (9.99) creates a sustained relationship between the player and the purchased item — every day they play, they benefit from the investment (Clark, Games as a Service, see source-games-as-a-service).
A mixed-model is recommended: offering consumables, durables, and permanents means different player types and spending habits each find something appropriate. The greater the range of payment options, the higher the conversion rate overall.
The Freemium Triangle
Attributed to Tadhg Kelly (author, What Games Are), and cited in Clark, Games as a Service, see source-games-as-a-service:
A game can sustainably offer any two of the following, but not all three simultaneously:
- Boosters — items that increase performance or speed (XP multipliers, damage buffs, time skips)
- Unlocks — items that open access to content (new levels, characters, abilities)
- Skips — items that bypass the waiting or grinding mechanic
Offering all three creates what Clark terms incoherence in the value proposition: if you can boost your speed, unlock the next tier, and skip the wait, then the core gameplay progression system — the thing players are actually paying for — has no integrity. The commercial model undermines the play experience, which is the definition of lucre-ludo-narrative dissonance (see below).
Practical application: decide which two of the three your game’s economy will support, and design the third out of the offer explicitly.
The gateway good
The gateway good is a first-purchase item designed to minimise the psychological barrier to a player’s first transaction (Clark, Games as a Service, see source-games-as-a-service). Properties of an effective gateway good:
- Low price — below the player’s psychological threshold for “a real purchase” (typically under $1–2 for casual mobile)
- High obvious value — the benefit should be immediately legible to a player who has been playing without purchasing; they already know they want it
- No regret risk — it should not feel like a gamble; the value must be predictable
- Contextually timed — presented at the moment the player is most motivated (just after a near-miss, at the beginning of a hard section, when their energy is running low)
The gateway good functions as the onboarding event for the Earning stage of the player-lifecycle. Once a player has made their first purchase, the psychological barrier to subsequent purchases is substantially lower. Clark references a “rent or buy” study at 3UK (a mobile network operator) showing that offering a rental/trial model significantly increased conversion to full purchase compared to offering only the full purchase up front (Clark, Games as a Service, see source-games-as-a-service).
Buyer psychology and pricing
Clark applies several models from consumer psychology to F2P pricing (Clark, Games as a Service, see source-games-as-a-service):
AIDA model (attributed to E. St Elmo Lewis): Awareness → Interest → Desire → Action. Monetisation UI should guide the player through this sequence; presenting a purchase prompt before desire is established will fail. Desire is a function of time spent with the game (lifecycle position), not just the quality of the item.
Buyer Behaviour Curve (adapted from Gartner Hype Curve): player willingness to purchase is not constant — it rises as the player invests in the game, peaks during deep engagement, and declines as they approach churn. Presenting high-value offers during the peak engagement window maximises conversion.
Hot-Cold Empathy Gap: a player who has just failed (emotionally “hot”) will make different purchase decisions than a player in a calm analytical state (“cold”). High-pressure upsells immediately after failure exploit this gap in a way Clark identifies as ethically problematic — it constitutes the false-urgency dark pattern (see dark-patterns). The preferred approach is to present purchase opportunities when the player is in a positive, motivated state — just after a success, at the start of a new session.
Price elasticity and the Exponential Demand Curve: F2P pricing does not follow standard economic demand models. Clark notes that a small number of players (whales) are willing to pay very high amounts, while the majority require very low price points to convert at all. This creates an exponential rather than linear demand curve, arguing for a wide range of price points — from 99.99 “mega-bundle” offers — so that each player finds a price point that matches their personal threshold.
Paradox of choice: offering too many purchase options at once reduces conversion. Curated, contextually appropriate offers outperform a full shop interface for first-time buyers.
In-game currency design
Clark gives extended treatment to currency systems (Clark, Games as a Service, see source-games-as-a-service):
- Single currency (grind gold): earned through play, used for all purchases. Accessible to all players; provides freeloaders a path to all content at the cost of time. Risk: if buying currency makes late-game grinding irrelevant, the motivational structure collapses.
- Premium currency (gems): earned slowly through play or purchased directly. Separates the “aspirational tier” from the standard tier. The best premium currencies cannot be purchased directly — they are earned through engagement but at a rate that makes paid accelerants attractive. Experience points are Clark’s example of a currency that should never be sold.
- Dual currency systems: a common pattern — standard gold (freely earned, wide use) plus premium gems (slowly earned or purchased, used for highest-tier items). Clark cautions against three or more currencies as this “reduces the value of having a currency at all.”
- Currency sinks: mechanisms that remove currency from the economy to prevent inflation. Necessary in any game with player-to-player trading or long-term economies. See internal-economy for broader treatment of economic balance.
Resource vs currency: a currency can be exchanged for any item; a resource has a specific use. Both can be earned through play; both can be monetised, but direct sale of a widely-used currency tends to undermine the gatekeeping function of the progression system.
Lucre-ludo-narrative dissonance
Clark’s original term for the tension created when a game’s commercial model conflicts with its stated values, fiction, or mechanical logic (Clark, Games as a Service, see source-games-as-a-service). Examples:
- A game set in a post-apocalyptic survival world that sells cosmetic fairy-wings — the aesthetic dissonance breaks the fiction.
- A hardcore skill-based game that sells power-ups — the mechanical dissonance undermines the skill-based value proposition.
- A game that claims to be “fair and balanced” while offering pay-to-win advantages — the ethical dissonance erodes trust.
Lucre-ludo-narrative dissonance is the monetisation analogue of the broader ludo-narrative dissonance concept (Clint Hocking, Bioshock critique). Clark cites the collectable card game mechanic as a case where the revenue model can become “a game in itself” that distracts from the intended experience — a cautionary case of this dissonance.
Ethical constraints
Clark identifies a set of ethical principles that he argues are both morally correct and commercially rational (Clark, Games as a Service, see source-games-as-a-service): disclose all costs; avoid false communications; do not use high-pressure sales tactics; do not imply payment is required when it is not; do not exploit children’s inexperience. These broadly align with the UK Office of Fair Trading guidelines (2013) and US COPPA requirements for under-13 audiences.
His “dynamite fishing” analogy captures the commercial argument: aggressive monetisation (dynamite) yields short-term revenue but destroys the audience (the lake) that the sustainable business depends on.
In practice
Monetisation audit checklist for a Unity live-service game:
- Is each purchase opportunity timed to a positive emotional state, not a frustration state?
- Is there a gateway good available for under $2 that a player with 5+ hours of play will immediately understand the value of?
- Are all three virtual good categories (consumable, durable, permanent) represented?
- Does the premium tier remain aspirational but reachable for a patient free player? (If no, this is pay-to-win.)
- Does the monetisation model pass the Freemium Triangle test — does it use at most two of Boosters, Unlocks, Skips?
- Is there any purchase mechanic that exploits randomness in a way that resembles gambling (complete gacha)?
- Does the monetisation interact with any mechanic in a way that produces lucre-ludo-narrative dissonance?
Unity implementation notes:
- Use Unity IAP (In-App Purchasing package) for cross-platform store integration.
- Durable goods are best modelled server-side with a timestamp-based accrual system (avoids client-side manipulation).
- Premium currency balances must be server-authoritative — never trust client-reported currency values.
- Personalised offer timing requires event analytics: fire an event at each positive-state trigger (level complete, boss defeat, streak milestone) and use that event to evaluate whether a contextual offer should be shown.
- For advertising, Unity Ads (Unity Gaming Services) provides opt-in video ad integration. Opt-in (“watch an ad for a reward”) is significantly better received than forced interstitials.
Evidence
Clark’s framework is drawn from extensive production experience (PlayStation Home at Sony, games-as-a-service consultancy, Applifier/Everyplay) and from practitioner references (Tadhg Kelly’s Freemium Triangle, the 3UK case study, OFT 2013 report). The buyer psychology models (AIDA, hot-cold empathy gap, loss aversion) are grounded in established consumer psychology literature, with Kahneman and Tversky cited for loss aversion and Maslow cited for the hierarchy of needs basis for Oscar’s Hierarchy of Games.
Academic grounding is lighter on the economics side — the Exponential Demand Curve and Buyer Behaviour Curve are Clark’s own visual models derived from observation rather than cited empirical studies.
Implications
- Monetisation should be designed concurrently with core mechanics — retrofitting a shop onto a completed game almost always produces lucre-ludo-narrative dissonance.
- Non-payers must receive genuine value — a game where non-payers feel like second-class citizens will lose the social and population density that paying players depend on (see player-lifecycle).
- First purchase is the critical event — conversion tracking should focus on the first-purchase rate, not total revenue. Once a player pays once, subsequent conversion follows far more easily.
- Regulatory risk is real and increasing — loot boxes with randomised outcomes are under active regulatory scrutiny in the UK, EU, and multiple other jurisdictions. The complete gacha mechanism (buying randomised sets to unlock rare item combinations) has already been ruled illegal in Japan. Design with regulatory trajectory in mind.
Open questions
- Clark’s Freemium Triangle is a practitioner heuristic — is there empirical revenue or retention data that supports or refutes it?
- The gateway good concept assumes that a player’s first purchase is the primary conversion barrier. What evidence exists that this is the case versus other barriers (trust in developer, uncertainty about value, payment friction)?
- How does the taxonomy of consumables/durables/permanents interact with contemporary subscription models (battle passes, season passes) which do not fit neatly into any of the three categories?
- Clark’s ethical framework (2014) predates GDPR, the UK Children’s Code, and the Belgian/Dutch loot box rulings. How would the framework need to be updated to reflect the current regulatory environment?