One Challenge is an inter-denominational, international, Christian faith mission sending agency. OC empowers local church min ... istry in more than 100 countries around the world. We believe that whole nations can be reached for Christ. OC is involved in Missions Mobilization, Church Planting & Growth, Education, Holistic Ministry, Leadership Development, Member Care, Partnering & Bridge Building, Research, Sports Ministries, as well as Business for Transformation. read more