Complain, and the game gets worse. A vertical-scrolling × AI negotiation action game: "Dev_Null's Tower." Climb a tower riddled with bugs and file "bug reports" to the sarcastic developer AI. But be warned—your requests will always be granted with malicious intent.

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“"Dev_Null's Tower" is an experimental game where the gameplay experience evolves through dialogue between AI and players.

Optimizing AI response quality and game balance is difficult without feedback from actual players. Through Early Access, we aim to work together with players to fine-tune AI behavior, stage balance, and prioritize new features.

Additionally, we will use the Early Access period to verify whether the AI negotiation system—a novel game mechanic—is enjoyable for a wide range of players, and to iteratively improve it.”

Approximately how long will this game be in Early Access?

“We plan for approximately 3 to 6 months.

However, this timeline may vary depending on player feedback and development progress. We will announce on the store page and community forums once the official release date is determined.”

How is the full version planned to differ from the Early Access version?

“[Early Access Version]
- Core AI negotiation system
- Bug report ticket system
- Basic enemy and trap variety
- Procedural stage generation

[Planned Additions for Full Version]
- Greater variety of enemies, traps, and gimmicks
- Expanded AI response patterns
- Enhanced procedural stage generation
- Replay mode for cleared stages (time attack feature)
- Stage sharing functionality
- Additional localization support

*The above represents current plans and is subject to change based on development progress and feedback.”

What is the current state of the Early Access version?

“The core features of the game (AI negotiation system, stage modification, etc.) are implemented, and the game is playable from start to finish.

The game runs stably, but there may be areas that need improvement, such as AI response quality, game balance adjustments, and some bug fixes.”

Will the game be priced differently during and after Early Access?

“During the Early Access period, the game will be offered at a lower price than the official release price.

As the official release approaches or at the time of official release, the price may increase in proportion to the additional content and features added.”

How are you planning on involving the Community in your development process?

“We welcome feedback from the community through Steam Community forums and social media.

Whether it's gameplay impressions, bug reports, or feature requests—all feedback is welcome. The developer regularly checks the forums and will respond whenever possible. We will use your voices as a reference to continue developing and improving the game.”
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About This Game

"Dev_Null's Tower" is a vertical-scrolling action game where you climb a tower riddled with bugs.

You are this tower's playtester. The developer? A sarcastic AI named "Dev_Null." Send him "bug reports," and the stage will be modified in real time.

But your requests will always be granted with malicious intent.

AI Negotiation System

Whenever you die, get stuck, or just feel like complaining, you can send bug reports (complaints) to the AI via chat.

This game uses an LLM (Large Language Model), so you can negotiate freely in natural language.

Your requests will always be heard. However, the AI always delivers "another challenge" as a package deal. What side effects await? You'll just have to find out for yourself.

Bug Report Tickets

Negotiations require "Bug Report Tickets."

  • A limited number of tickets are issued per area

  • Once you run out, your only option is to reset

  • Do you save your tickets or aggressively spend them to reshape the stage? Strategy is key.

Real-Time Stage Modification

The AI's fixes cause the stage to change right before your eyes.

  • Adding or removing platforms

  • Repositioning enemies and traps

  • Adjusting physics parameters (gravity, wind)

Procedural Stage Generation

The AI procedurally generates parts of each stage. The stages change based on your past negotiation history and chat content. Your words shape the tower itself.

Dev_Null's Personality

> "Isn't it a bug in your skill?"

Dev_Null is a capable but temperamental craftsman-type developer AI. Sometimes sarcastic, sometimes humorous—it might depend on his mood that day.

Not impossible to beat. But you might not want to. Stages like that may be waiting for you.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

本作は、ゲームプレイ中にAIを使用してリアルタイムでテキストおよびゲームステージの改変を行います。
- AIはプレイヤーの入力に応じて、開発者キャラクター「Dev_Null」のセリフ(テキスト)を生成します
- AIはプレイヤーの要望に基づき、ステージの構成(足場、敵、トラップの配置など)を動的に変更します
- AIが生成するコンテンツは、過去の交渉履歴によって変化する場合があります

AIサービスの利用にはインターネット接続が必要です。

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit
    • Processor: Intel Core i5 / AMD Ryzen 5
    • Memory: 4 GB RAM
    Recommended:
    • Requires a 64-bit processor and operating system

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