Where Our Data Comes From

We use publicly available game data from Steam, Roblox, Jagex, and other game publishers. We also use exchange rates from the European Central Bank.

Sources at a Glance

Steam: We retrieve our data from official Steam APIs.
Roblox: We retrieve our data from official Roblox APIs.
Epic Games: We retrieve Fortnite data from Epic Games’ official API.
Jagex: We use official public Jagex player totals and calculate the RuneScape figure from them.
CCP Games and NetEase: We add the official EVE Online server populations.
CipSoft via TibiaData: We retrieve Tibia player totals through TibiaData’s API.
ppy: We use osu!’s official player count.
European Central Bank: We retrieve official reference exchange rates from the European Central Bank.

Why Are Peak Numbers Different From Other Sites?

Peaks on ChartBuff are the highest values we have seen since September 28, 2026. Other sites may cover a different time period.

Steam

Steam supplies the public information used for Steam game pages: concurrent player counts, store details, reviews, prices, and discounts. Live and weekly Top Sellers positions are separate series because they describe different ranking periods.

Roblox

Roblox supplies the public information used for Roblox game pages: current player counts, experience details, and other public activity counters. Not all Roblox experiences may be currently visible. To add a missing game, please .

Fortnite

We get Fortnite’s peak player count from Epic Games’ official API. Each count covers a ten-minute interval and is published with a delay.

RuneScape and Old School RuneScape

Jagex publishes an Old School RuneScape count and a combined count for both games. We calculate the RuneScape figure by subtracting the Old School RuneScape count from the combined total.

EVE Online

We add the Tranquility, Serenity and Infinity populations from CCP Games’ and NetEase’s official status APIs.

Tibia

We retrieve Tibia player totals through TibiaData’s API, based on CipSoft’s official website.

osu!

We retrieve osu! player counts from ppy’s official API.

Exchange Rates

We use European Central Bank reference rates to convert regional Steam prices to a USD representation.

Third-Party Rights

Game names, trademarks, logos, artwork, and other third-party materials remain the property of their respective owners. They are used for identification and informational purposes only. Their appearance does not imply affiliation, sponsorship, or endorsement.

ChartBuff is not affiliated with Valve, Roblox, or any other game publisher. See the Terms of Use for the complete notice.