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End User License Agreement
Last Updated: June 12, 2026
*This document is a reference translation. The Japanese version has legal effect.
1. This Agreement
This End User License Agreement (hereinafter referred to as "this Agreement") is a legal agreement between star2020 and the user regarding the installation, purchase, or use of the game provided by star2020 (as defined below).
・The Door
By installing, purchasing, or using this game, you agree to this agreement.
2. License
star2020 grants users a non-exclusive right to use this game for personal use only.
3. Prohibition
The following actions are prohibited:
・Unauthorized use of game assets (redistribution, sale, use for AI learning purposes, etc.)
・Use that violates laws or public order and morals
・Illegal activities using this game
4. Copyright
The copyright and related rights to the content included in this game belong to star2020 or the rightful rights holder.
Some of the materials, assets, and sound sources used are credited in the game or on the relevant pages.
5. Disclaimer
star2020 assumes no responsibility whatsoever for any damages arising from the use or inability to use this game.
This game contains Unreal® Engine and related code, materials, and information from Epic Games, Inc. (hereinafter referred to as "Epic Games").
Content related to Unreal® Engine is provided "as is," and Epic Games makes no warranties, express or implied.
Furthermore, Epic Games shall not be liable for any damages or losses arising in connection with the use of Unreal® Engine., Epic Games is not responsible for any damages or losses incurred as a result of using this game.
6. Changes to Content
star2020 may change the content, functions, and specifications of this game or discontinue its provision without prior notice. Additionally, the contents of this agreement can be changed as necessary.
Last Updated: June 12, 2026
*This document is a reference translation. The Japanese version has legal effect.
1. This Agreement
This End User License Agreement (hereinafter referred to as "this Agreement") is a legal agreement between star2020 and the user regarding the installation, purchase, or use of the game provided by star2020 (as defined below).
・The Door
By installing, purchasing, or using this game, you agree to this agreement.
2. License
star2020 grants users a non-exclusive right to use this game for personal use only.
3. Prohibition
The following actions are prohibited:
・Unauthorized use of game assets (redistribution, sale, use for AI learning purposes, etc.)
・Use that violates laws or public order and morals
・Illegal activities using this game
4. Copyright
The copyright and related rights to the content included in this game belong to star2020 or the rightful rights holder.
Some of the materials, assets, and sound sources used are credited in the game or on the relevant pages.
5. Disclaimer
star2020 assumes no responsibility whatsoever for any damages arising from the use or inability to use this game.
This game contains Unreal® Engine and related code, materials, and information from Epic Games, Inc. (hereinafter referred to as "Epic Games").
Content related to Unreal® Engine is provided "as is," and Epic Games makes no warranties, express or implied.
Furthermore, Epic Games shall not be liable for any damages or losses arising in connection with the use of Unreal® Engine., Epic Games is not responsible for any damages or losses incurred as a result of using this game.
6. Changes to Content
star2020 may change the content, functions, and specifications of this game or discontinue its provision without prior notice. Additionally, the contents of this agreement can be changed as necessary.