Horizon Era uses map data and a handful of icons/sprites under Creative Commons licenses that require attribution. That's listed here in full.
Map tiles © OpenStreetMap contributors, available under the Open Database License (ODbL).
The following icons are recolored versions of originals from game-icons.net, licensed under CC BY 3.0:
| Used for | Original icon | Author |
|---|---|---|
| flag | Flag objective | Delapouite |
| tree | Oak | Lorc |
| stag (icon) | Deer | Caro Asercion |
| sword | Pointy sword | Lorc |
| wood | Wood pile | Delapouite |
| leather | Animal hide | Delapouite |
| character | Character | Delapouite |
| bag | Backpack | Delapouite |
| chop | Wood axe | Lorc |
| hunt | Bow arrow | Delapouite |
| pickup | Grab | Lorc |
| info | Info | Delapouite |
| build | Hammer nails | Lorc |
| jump | Teleport | Lorc |
| menu | Hamburger menu | Delapouite |
| gold | Two coins | Delapouite |
| wolf | Wolf howl | Lorc |
| shield | Bordered shield | Lorc |
| craft | Anvil | Lorc |
Every other icon, sprite, and background image in Horizon Era is original artwork generated specifically for this project and requires no external attribution.