The Black Book of Communism has communist government death totals at:
* U.S.S.R.: 20 million deaths
* China: 65 million deaths
* Vietnam: 1 million deaths
* North Korea: 2 million deaths
* Cambodia: 2 million deaths
* Eastern Europe: 1 million deaths
* Latin America: 150,000 deaths
* Africa: 1.7 million deaths
* Afghanistan: 1.5 million deaths
This totals just over 94 million. These are the deaths committed by government agents against citizens of their own country.
This source estimates the Chinese number between 50 and 78 million deaths and the Soviet number at 23 million which is similar in magnitude to the source above.