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Security report for deltarune.com

Toby Fox · Media · N/a

Partial score · DNS & email only

71/100

0–100, higher is better. How it is calculated

The website deltarune.com serves as the official portal for the indie game DELTARUNE, created by Toby Fox. It provides information about the game available on multiple platforms including Nintendo Switch, PC/Mac, and PlayStation. The site offers direct links to purchase or download the game, soundtrack, and merchandise, targeting gamers and fans of the UNDERTALE series. The business model revolves around digital sales and merchandising with a strong niche market presence and a dedicated fanbase. Technically, the site is a modern, fast-loading static website using Bridgetown framework and Cloudflare DNS services, optimized for mobile and desktop with good SEO and accessibility features. Security posture is solid with HTTPS and domain transfer protections, though some improvements like DNSSEC and security headers could be made. Privacy compliance is basic with a privacy policy linked externally but lacks cookie consent mechanisms. Overall, the site is professional, trustworthy, and well-maintained, reflecting a small but reputable indie game business.

Scanned

3 of 7 checks could not complete. The site may be unreachable or blocking automated scans, so the results below cover only what could be checked. Try a rescan later.

NIS2 and GDPR posture

NIS2 outside view
Not assessed
GDPR outside view
Not assessed

Both readouts depend on the site's pages, which could not be loaded in this scan.

Priority findings

3 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

    • High

      No SPF record found

      SPF helps prevent email spoofing

      What to do: Add SPF record: "v=spf1 include:_spf.yourmailprovider.com ~all"

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

Need hands-on remediation? Email guard@offseq.com

Keep watching deltarune.com

This scan found 14 issues across 4 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
75
Email security
40
DNS health
70
Network security
100
Average
71

Not counted

  • Security headers: did not complete in this scan.
  • GDPR outside view: did not complete in this scan.
  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

DELTARUNE operates in the media and entertainment sector, focusing on indie game development and distribution. The company leverages multiple digital storefronts and merchandising partnerships to monetize its intellectual property. Its competitive advantage lies in the cult following of its predecessor, UNDERTALE, and the unique gameplay and storytelling experience it offers. The business targets gamers globally, especially those interested in RPGs and indie games. The partnership ecosystem includes major platform stores like Steam, Nintendo, and PlayStation, as well as merchandising through Fangamer. Growth indicators include ongoing chapter releases and active community engagement via newsletters and social media. The company maintains a lean operation with a focus on quality content and fan engagement.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and domain transfer protections in place. However, it lacks advanced DNS security features like DNSSEC and does not publish explicit security or incident response policies. No security headers were detected, which could improve protection against common web attacks. The absence of a cookie consent mechanism is a compliance gap given the use of analytics services. No vulnerabilities or exposed sensitive data were found. Overall, the security posture is good but could be enhanced with additional best practices and transparency.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement and display a cookie consent banner to comply with GDPR and other privacy regulations.
  3. Add security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  4. Publish a security policy and incident response contact information to improve transparency and trust.
  5. Regularly review third-party scripts and analytics tools to ensure no vulnerabilities or privacy issues.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Toby Fox
Description
UNDERTALE's parallel story, DELTARUNE. Meet new and old characters in a tale that steps closer to its end, chapter by chapter. Dodge bullets in nonviolent RPG battles as you listen to funky, funky music.
Key services
Game distribution on multiple platforms, Soundtrack sales, Merchandising, Newsletter updates
Content quality
excellent
Branding
consistent

Technology

Stack
HTML5, CSS3, JavaScript, Cloudflare DNS
Frameworks
Bridgetown (static site generator)
Platforms
Nintendo Switch, PC / Mac, PlayStation 4, PlayStation 5
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • clientTransferProhibited domain status

Analytics and tracking

Services
Plausible Analytics, Cloudflare Insights
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Cloudflare Insights, Plausible Analytics
Transparency
basic

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professionally presented with clear navigation and multiple platform support.
  3. No direct contact emails or phone numbers found on the site.
  4. Privacy policy is linked but hosted on a third-party domain (fangamer.com).
  5. No cookie consent mechanism detected despite analytics usage.
  6. No explicit security or incident response policies published.
  7. Use of modern static site generation framework (Bridgetown) and Cloudflare DNS.
  8. Social media presence includes Twitter and Bluesky with official links.
  9. No suspicious or malicious content detected.
  10. ESRB rating and trademark notices indicate legitimate commercial product.
Technical notes

Notes

The website is built using modern web technologies including HTML5, CSS3, and JavaScript, with the Bridgetown static site generator framework. Hosting and DNS are managed via Cloudflare, providing performance and security benefits. The site is optimized for mobile devices and accessibility, with fast loading times and good SEO practices. No CMS or dynamic backend was detected, reducing attack surface and complexity. The use of deferred JavaScript and optimized images contributes to performance. However, the site could benefit from additional security headers and DNSSEC implementation. Overall, the technical infrastructure is robust, modern, and well-suited for the site's purpose.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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