Here is the full list of all 14 Chef: A Restaurant Tycoon Game achievements.
You opened a restaurant in a Countryside Area
You opened your first restaurant!
You opened a restaurant in a Residential District
You acquired all cooking skills!
You have more than 1'000'000 in your account
Your restaurant got one WebGuide Star!
Your restaurant got two WebGuide Stars!
You achieved the third WebGuide Star!
You opened a restaurant in a Small Town
You opened a restaurant in an Industrial District
You opened a restaurant in a Suburbs Area
You opened a restaurant in a Commercial District
You opened a restaurant in a Business District
You opened a restaurant in the Old Town