أخي هاد من الموقع الرسمي لليونيتي

If you are accepting the terms of this Agreement on behalf of a Legal Entity for use of Unity Free, you represent and warrant that: (i) if the Legal Entity is a commercial entity, the annual gross revenues of the Legal Entity during its prior fiscal year did not exceed US$100,000 (or an equivalent amount in another currency); and (ii) if the Legal Entity is an educational, academic, non-profit or government entity, the total annual budget for the entire Legal Entity during its prior fiscal year did not exceed US$100,000 (or an equivalent amount in another currency). You expressly acknowledge and agree that if the annual gross revenues or annual budget, as applicable, of the Legal Entity during its prior fiscal year exceeded US$100,000 (or an equivalent amount in another currency), then Unity is unwilling to license Unity Free to you, and you must destroy all copies of Unity Free in your possession or control or you must purchase Unity Pro

http://unity3d.com/company/legal/eula

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