Sources & permissions
Legal & Attributions
Echoes of Time combines original work, user-supplied assets and third-party resources. The licences below apply to their respective resources, not to the game as a whole.
Music & recordings
The homepage instrument uses 23 individually struck Mark Tree bars by Kion001 on Freesound, licensed CC BY 3.0. Each recording retains its original pitch; filtering, gain normalization, endpoint fades and OGG conversion are documented in the recording credits. Earlier pjcohen sweep recordings remain archived for rollback.
Footsteps on different surfaces — tile
congusbongus; swuing; ceberation · Original source · CC BY 3.0
Cuts, filters, gain, fades, mono conversion and Ogg encoding. Retain exact source-chain notes in existing credits.
Upstream recording: swuing · Licence
Upstream recording: ceberation · Licence
Paper Pages Sounds
Vinrax · Original source · CC BY 3.0
Excerpts, channel/sample-rate conversion, level adjustment, fades and compressed encoding.
Glass Bell Sounds
Hansjörg Malthaner (Varkalandar) · Original source · CC BY 3.0 (chosen from the alternatives offered)
Excerpts, channel/sample-rate conversion, level adjustment, fades and compressed encoding.
Evening Fall (Harp)
Kevin MacLeod · Original source · CC BY 4.0
Channel/sample-rate conversion, level adjustment, fades and compressed runtime encoding; not a historically authentic period recording.
Desert City
Kevin MacLeod · Original source · CC BY 4.0
Channel/sample-rate conversion, level adjustment, fades and compressed runtime encoding; not a historically authentic period recording.
I Knew a Guy
Kevin MacLeod · Original source · CC BY 4.0
Channel/sample-rate conversion, level adjustment, fades and compressed runtime encoding; not a historically authentic period recording.
Instrumental tracks are modern artistic interpretations, not surviving recordings from the depicted periods. Other environmental sources include CC0 recordings; full source, modification and attribution records are retained below.
- virtual-chimes: recording credits
- calm-pools: recording credits
- mark-tree: recording credits
- recordings-v1: recording credits
- immersion-v1: recording credits
- experience-v1: recording credits
- experience-v2: recording credits
- experience-v7: recording credits
Geographic sources
Islamic Cairo and the legacy geographic reference use © OpenStreetMap contributors, ODbL . Playable geography is compressed and contains fictional passages. This attribution does not identify fictional architecture as surveyed geography.
Visual assets & fonts
Selected surface materials come from Poly Haven (CC0). First-person model credits and source history retain the MakeHuman and garment asset terms. The homepage uses Space Grotesk by Florian Karsten , locally hosted under the SIL Open Font License 1.1 . The title uses Jost by Owen Earl / indestructible type, locally hosted under SIL OFL 1.1 (see /fonts/jost/OFL.txt). Royal Cairo signs use Aref Ruqaa by Khaled Hosny under its SIL Open Font License 1.1 ; connected Arabic is baked into the sign atlas.
Other character, vehicle and architectural models were supplied by the project owner, including Tripo-derived assets. These are not offered under the open licences listed above. Account-specific generation and redistribution entitlements have not been independently verified in this local asset audit.
Arabic headings use Alexandria; body text and controls use IBM Plex Sans Arabic. Both are hosted locally under the SIL Open Font License 1.1. Alexandria — OFL · IBM Plex Sans Arabic — OFL
Software
Built with React, Next.js, Three.js, React Three Fiber, Drei, Rapier and their dependencies. Copyright notices and licence texts are preserved in the third-party software notices.