Third-party licenses

Last updated November 3, 2026

Ketchup Strike is built on Unreal Engine and uses work by other authors. Thank you. Everything else in the game (code, maps, heroes, animation, sounds, music and texts) was made for the game and belongs to Yury Potapov.

Engine and SDKs

• Unreal® Engine: Ketchup Strike uses the Unreal® Engine. Unreal® is a trademark or registered trademark of Epic Games, Inc. in the United States of America and elsewhere. Unreal® Engine, Copyright 1998–2026, Epic Games, Inc. All rights reserved. Used under the Unreal Engine EULA. Some character content (the Manny skeleton and references) is Epic Games material under the same license.
• Steamworks SDK: © Valve Corporation, under the Steamworks SDK Access Agreement. Steam and the Steam logo are trademarks of Valve Corporation.
• FreeType: Portions of this software are copyright © The FreeType Project (www.freetype.org). All rights reserved.

Fonts

• Rubik: Copyright 2015 The Rubik Project Authors (github.com/googlefonts/rubik), SIL Open Font License 1.1.
• Russo One: Copyright © 2011–2012, Jovanny Lemonad (jovanny.ru), with Reserved Font Name “Russo”, SIL Open Font License 1.1.

Character models and anatomy

• Human Base Meshes 1.4.1: Blender Studio / Julien Kaspar, blender.org, CC0 1.0. The base of the heroes' bodies, eyes and hands, reworked for the game.
• Rain Rig: (CC) Blender Foundation | studio.blender.org, CC BY 4.0. Hair, teeth and tongue geometry and hair texture were adapted for a character of the Sub-Zero operation (fitting, colour, weights, morphs, baking).
• Bust for full-colour 3D printing: PrintedReality, pinshape.com, CC BY 4.0. Only a reworked facial surface is used, for a stylised character of the Sub-Zero operation; the bust's hair, clothing, body and photo texture are not used. The original author does not endorse and is not affiliated with the game.

First-person weapons

• s&box first-person weapons (flash, frag, smoke and Molotov grenades, arms): Facepunch Studios, sbox.game, CC0 1.0. Reworked and recoloured for the game.

Sounds

• Fast Steps on Concrete (No. 1318): Joseph SARDIN, BigSoundBank.com, CC0 1.0. Footsteps and landings. Additional sounds: Joseph SARDIN — BigSoundBank.com.

Generated content

Some voices, music, sounds and images were made with generation tools (ElevenLabs, OpenAI) and finished by hand; the rights to the results belong to Yury Potapov under those services' terms.

Found your work without credit, or think something is used wrongly? Write through support and we will sort it out.