Terms of sale
Last updated on 14 November 2026
These terms apply to the custom Unreal Engine work I do for you (development, prototypes, features, networking, bug fixing and testing), ordered through this site or by email. Each project also has its own quote.
Who and what
The services are provided by Sialdev, the sole trader listed in the legal notice. They are open to businesses and to individuals. When you accept a quote, you state whether you order as an individual (consumer) or as a business; some rules below differ between the two.
Assets bought on Fab follow Fab's terms, and orders placed on Fiverr follow Fiverr's terms, not these. The version of these terms that applies to your project is the one online on the day you accept the quote.
How an order works
- You send a request with your project details.
- I send you a quote with the scope, the deliverables, the Unreal Engine version and target platforms, the price, the estimated timeline and the number of revision rounds. A quote is valid for 30 days.
- You accept the quote in your client area by ticking the boxes shown there, or by replying in writing that you accept the quote and these terms. Then you pay the deposit and the order is confirmed.
- I deliver the work, you check it, and you pay the balance.
The quote and these terms form our contract. If they disagree, the quote wins. Anything agreed by call or chat counts only once it is confirmed in writing, in your client area or by email.
Prices and payment
Prices are in euros unless the quote says otherwise. VAT is not charged, under article 293 B of the French Tax Code. The prices shown on the site are starting prices; only the quote is binding.
- Deposit: 50% of the quote, paid when you accept it. Work starts once it is received. This sum is a down payment (acompte), not arrhes: it confirms the order for both of us and is not refundable, except in the cases listed under "Right of withdrawal", "Cancellation" and "Delays and force majeure".
- Balance: the remaining 50%, paid on delivery, within 7 days of the invoice. The final files and the rights are handed over once it is paid.
- Large projects: above €2,000, the quote can split the balance into milestones, each paid when that part is delivered.
- Method: the one given on the quote and the invoice (for example bank transfer).
If a payment is late, I can pause the work until it is received; the timeline moves by the same amount. For business clients, late payment also incurs penalties at three times the French legal interest rate and a fixed €40 recovery fee (article L441-10 of the French Commercial Code). No discount is given for early payment.
Scope and changes
The work is checked against the quote. A new idea or a change to what was agreed is not a fix: I send you a short quote for it first, and only do it once you accept. Accepted changes can move the timeline.
Delivery and acceptance
Timelines are estimates given on the quote. They move by the same amount when I'm waiting on your files, access, feedback or payment. I deliver through your client area or a download link. The quote states how many revision rounds are included; extra rounds are billed separately.
You have 7 days after delivery to report anything that doesn't match the quote. I fix those points at no extra cost. The delivery is accepted when that time ends without feedback, or earlier if you use the work in a published build, release it or have it changed by someone else.
Keep your own copy of everything delivered. I keep a backup for 3 months after delivery, without any obligation beyond that.
Right of withdrawal
If you order as an individual (consumer), you can withdraw within 14 days of accepting the quote, without giving a reason. Send a clear statement, or the form below, by email to sialdev.pro@gmail.com. I then refund the deposit within 14 days, by the same payment method.
Unless you ask otherwise, I start the work once those 14 days are over. If you ask me in writing to start sooner, you only pay for the work already done when you withdraw, and I refund the rest of the deposit. Once the work is fully delivered at your request within those 14 days, you can no longer withdraw (articles L221-18, L221-25 and L221-28 of the French Consumer Code).
Business clients have no right of withdrawal.
Cancellation
- By you, after the withdrawal period: the deposit is kept to cover the work done and the time booked for your project. Nothing more is owed, unless the work delivered so far is worth more than the deposit; in that case, I'll invoice it at the quote's rates.
- By me: if I can't finish the project, I refund what you paid for the work not delivered.
- Inactivity: if you don't reply for 60 days during a project, I can close it. The deposit is kept and the work done so far can be delivered against payment.
Delays and force majeure
If something beyond our control delays the project (serious illness, accident, natural disaster, major outage of a service the work depends on), neither of us owes compensation for the delay. I'll tell you as soon as possible and we'll agree on a new date. If the delay lasts more than 30 days, either of us can cancel, and I refund what you paid for the work not delivered.
Ownership of the work
Once the balance is paid, you receive the exclusive rights to reproduce, adapt, distribute and commercially exploit the work made for your project, worldwide, on any medium, for the full duration of copyright. Until then, the work stays mine.
Tools, code and assets I made before or outside your project and reuse in it remain mine; you get a free, permanent, non-exclusive licence to use them within your project. Third-party content (Unreal Engine, marketplace assets, plugins) stays under its own licence.
Confidentiality and your materials
I keep your project, files and information confidential, and I'm happy to sign an NDA on request. I only show the work in my portfolio once your project is public, and never if you ask me not to.
You confirm you hold the rights to the files, assets and information you send me. If a third party claims that they infringe their rights, you are responsible for it.
Warranty and liability
I do the work with care and to the standards of the trade. Individuals benefit from the legal guarantee of conformity for digital content and services (articles L224-25-1 and following of the French Consumer Code).
The work is made for the Unreal Engine version and platforms given on the quote. I don't guarantee the commercial success of your project, its approval by a store or a console maker, or its compatibility with later engine versions or third-party plugins. I'm not liable for changes made by someone else after delivery.
For business clients, my liability is limited to direct damage and to the amount paid for the project; indirect losses such as lost revenue, lost data or missed opportunities are excluded. These limits don't apply to gross negligence or wilful misconduct. Personal data is handled as described in the privacy policy.
Applicable law and disputes
These terms are governed by French law. If a problem comes up, please email me first so we can sort it out. Individuals can also use the free services listed in the legal notice, and keep the protections of the consumer law of their country. For business clients, and where the law allows it, the courts of Montpellier have jurisdiction.
If one clause of these terms is found invalid, the others still apply.
Withdrawal form
Individuals only. Fill in and send this form only if you want to withdraw from the contract.
To Sialdev, Yohann FRANCES EI, sialdev.pro@gmail.com (postal address in the legal notice):
I hereby give notice that I withdraw from my contract for the provision of the following service:
Quote reference and description:
Quote accepted on:
Your name:
Your address:
Signature (only if sent on paper):
Date: