You need an embassy visa for Namibia if you have an Indian passport
Visa options for Namibia
Electronic visitor visa for Tourism
Travelers need a visa to visit Namibia for Tourism. A Namibian eVisa is the fastest and easiest way of obtaining a visa for Namibia because travelers can submit their application and supporting documents online. Once the application is approved, travelers receive their eVisa confirmation electronically. A valid visa is required to board the flight. If the visa is expired or doesn’t match the traveler’s passport information, travelers will not be able to board their flight.