- "What have I done?!"
- ―Dr. Rosenthal's last words
He and his daughter Helena Rosenthal have discovered artifacts in Afghanistan, Baghdad and Siberia that gave evidence to possible long-dead advanced species. The IAS then went to the Lingshan Islands where they found what they believed to be a statue or fossil in the jungle, which was actually an inactive Ceph Scout. The Scout began transmitting a signal to a structure in the island's main mountain. At some point, the Ceph structure in the mountain began causing massive earthquakes that were felt as far away as Hawaii. Either the IAS or the KPA created tunnels to the structure.
After the KPA occupied the island, Rosenthal was forced to continue his work on the inactive Ceph Scout under the watch of the North Koreans. While talking via telecom to General Kyong, Rosenthal attempted to warn the general not to open the Ceph structure, but was ignored. Seeing the results of one of his tests, Rosenthal attempted to warn Helena that the Scout was still alive. It is not known what he meant by this, but soon afterwards, the Scout emitting a freezing burst that killed Rosenthal, freezing him solid.
- "I'm not concerned with your diplomatic manouverings, General."
- ―Dr. Rosenthal to General Kyong, dismissing the latter's point that Americans are already on the island.
- Dr. Rosenthal is voiced by Doug James.
|Characters in Crysis and Crysis Warhead|
|KPA||Lee Kim-sun · Kyong Ri Chan|
|Raptor Team||Aztec · Jester · Nomad · Prophet · Psycho|
|Eagle Team||Bandit · Bear · Blue Dog · Cupcake · Dane|
|Research Team||Martin Badowski · David Rosenthal · Helena Rosenthal · Hostage|
|US Military||Richard Morrison · Clarence Strickland · Sean O'Neill · Emerson · Tim Gillespie · Bradley|