Claude Le Roy's side came from back from a two-goal deficit to draw with tournament favorite Ghana.
The Ghanaians first solid chance came though Asamoah Gyan, who was played through on-goal with pinpoint accuracy by Derek Boateng, but the Al-Ain forward dallied too much and sliced the ball wide.
Congo responded with a sustained period of pressure, but the Leopards were stung in the 40th minute as Agyemang-Badu scored the first goal of the tournament after a wonderful bit of play from Asamoah, who played a quick one-two with Gyan before setting up Agyemang-Badu for the tap-in.
The Ghanaians came out well in the second half carving out another good opening, and Asamoah was on hand to head in from a corner taken by Mubarak Wakaso to give the Ghanaians a two-goal cushion four minutes after the restart.
Congo responded to the goal like it had responded to all Ghana’s chances in the game with another period of pressure, but this time it made good use of it as Mputu did well to pull one back with a smooth finish.
The Ghanaians responded again, but Gyan failed to get his effort on goal past the first defender despite being in a very good position. Congo made the Black Stars pay in the 67th minute after a smooth finish from the spot by Dieumerci Mbokani, who won the penalty off Jeremiah Akaminko.
Both sides tried to find the winner, but neither managed it, with Congo having a scare late into injury time as Muteba Kidiaba almost carried a save from Gyan’s header into his own net. The 29th edition of the Africa Cup of Nations is still yet to see any team win a game, and both sides will will be looking to build on this Group B result against the other group members, Mali and Niger, who have yet to play.