Reference
Game catalog
List games returns the games enabled for your account. This page explains the metadata it contains.
Categories
| Category | How it plays | Win callback |
|---|---|---|
crash | Collective round with a rising multiplier. The player cashes out before the crash. | On cash-out. |
roulette | Collective round of the double family: the player bets on a colour or number. | After the result, for winning bets. |
wall-street | Collective round on a simulated price chart. | After the result, for winning bets. |
rush-hour | Collective round. | After the result, for winning bets. |
slot | Individual spin on a 3×3 grid. | Immediately after the spin, when it pays. |
RTP
rtp is published only when the game's mathematics is versioned and its return has been measured. Otherwise it is null.
| Field | Description |
|---|---|
value | Return to player, in percent, with two decimals. |
source | How the value was obtained: simulated, theoretical or certified. |
math_version | Version of the game mathematics the value refers to. |
Current publication:
| Games | value | source | math_version |
|---|---|---|---|
| Amazonia Adventure, Iara Folclore, Fortune Dragon, Fortune Dragon V2, Fortune Olympus, and other slots on the same 3×3 mathematics | 96.82 | simulated | 2026.10.1 |
| All other games | null | — | — |
The RTP observed on your traffic varies with volume and player behaviour, and converges to the published value only over a very large number of rounds.
RTP profiles
On 3×3 slots you can choose, per enabled game, one of five RTP profiles: 98, 96, 94, 92 or 90%. Crash, double, wall-street, rush-hour and instant games keep a fixed RTP.
- Choose the profile in the KOI Backoffice, on the game list of your account. Leaving it on Default keeps the published value above.
- The profile is fixed when a session opens. Sessions already open keep the profile they started with; new launches use the new one.
- When a profile is set,
GET /games/activatedreturns it inrtp.value.sourceandmath_versionkeep describing the mathematics the profile runs on. - Only the frequency of the respin feature changes between profiles. Paytable, lines, symbols and maximum win stay the same.
Volatility
volatility is low, medium or high when classified, and null otherwise. No game is classified yet.
Bet levels
bet_levels lists stake values per currency. Use them to build stake selectors or to validate free-bet values. The player chooses among these values inside the game.
Availability
A game is listed only while it is active on the KOI platform and enabled for your account. When KOI deactivates a game, or disables it for your account, it disappears from List games and new sessions for it are refused with 401.