Fortress Line

Third-Party Notices

Last updated: September 27, 2026

This page identifies third-party technologies and offline production tools associated with Fortress Line. Their names and marks belong to their respective owners. Acknowledgment does not imply sponsorship or endorsement.

Game engine and VR platform

Unreal Engine 5.4 by Epic Games is used under the applicable Epic Games license. Unreal and Unreal Engine are trademarks or registered trademarks of Epic Games, Inc. Third-party components distributed with the engine remain subject to their respective license notices.
Meta XR technology, including Meta Quest and Oculus/Meta runtime components, is used under the applicable Meta platform and SDK terms. Meta and Meta Quest are trademarks of Meta Platforms, Inc.
Khronos OpenXR Loader provides the application interface to the headset runtime. The loader's applicable source and redistribution notices are available from the Khronos OpenXR SDK source; relevant loader files are offered under Apache License 2.0 or MIT terms.

Offline audio production tools

Some final audio assets were created or processed offline using the following tools. The tools and model weights are not included in the game and do not run while the game is played.

MOSS-SoundEffect v2.0 by the OpenMOSS Team. The project and model are published under Apache License 2.0. See the model page and source repository.
Qwen3-TTS by the Qwen Team at Alibaba. The project and official model checkpoints are published under Apache License 2.0. See the source repository and official model page.
Kokoro TTS by hexgrad and contributors. The project and model are published under Apache License 2.0. See the source repository.

Apache License 2.0

Characters and animation

Some character and animation content carried over from Action Squad was obtained through Adobe Mixamo. Adobe states that Mixamo characters and animations may be used royalty free in commercial video games. Adobe and Mixamo are trademarks of Adobe. See the official Mixamo FAQ.

Fonts

Fortress Line uses fonts supplied through Unreal Engine, including Roboto and Droid Sans fallback fonts where applicable. These font components remain subject to their respective licenses and notices distributed with the engine.

Contact

Questions about these notices may be sent to zp1412042552@gmail.com.