Terms of Use
The short version: Slipstream is a $4.99 one-time purchase — no subscription — provided as-is, with a 7-day money-back guarantee. Be sensible, and enjoy.
Last updated: 13 June 2026.
What Slipstream is
Slipstream is an independent utility — a $4.99 one-time purchase, no subscription — that reads the telemetry data Forza Horizon 6 broadcasts via its built-in "Data Out" feature. It does not modify the game in any way. All tuning changes are made by you, by hand, in the game's own menus.
Slipstream is made by M81 Studio. Purchases are processed by Gumroad, Inc. as the merchant of record.
No affiliation
Slipstream is not affiliated with, endorsed by, or sponsored by Forza, Playground Games, Turn 10 Studios, Xbox Game Studios, or Microsoft. "Forza" and "Forza Horizon" are trademarks of Microsoft Corporation, used here only to describe compatibility.
As-is, no warranty
Slipstream is provided "as is", without warranty of any kind, express or implied. Tuning advice is generated from telemetry and a rules engine; it is advice, not a guarantee of lap time, and you apply it at your own discretion. To the maximum extent permitted by law, the authors are not liable for any damages arising from use of the software or this site.
Fair use of the software
- One purchase covers your personal, non-commercial use on your own machines.
- Don't redistribute modified builds presented as official.
- Don't use the name or branding to imply endorsement by Microsoft or Playground Games.
Refunds
Every purchase carries a 7-day money-back guarantee: if Slipstream isn’t for you within the first week, request a refund — one click, no questions, no hoops. Promotional keys (e.g. launch-video giveaways) have no cash value and aren’t refundable, because they were free.
Governing law
These terms are governed by the laws of the State of California, USA, without regard to its conflict-of-laws rules — and without depriving you of any mandatory consumer protections of your country of residence.
Changes
These terms may be updated as the project evolves; the "last updated" date above reflects the current version. Continued use after changes means you accept them.
Questions, or refund help? Email support@slipstreamforza.com — or see the FAQ and Privacy.