After the turn of the century, several innovative shipbuilding projects took place at the Óbuda shipyard of the DDSG. Motorboats were built for military orders, the first refrigerated barge was built here in 1910, and the first oil-fired ship of the DDSG, the MOTOR I (1912), was also completed. During World War I, the DDSG not only took part in Danube transport, but also had three of its steamships (KULPA 1868, TRAISEN, 1884 and ERZHERZOG FRANZ FERDINAND, 1913) converted into Red Cross ships, nine of its barges into hospital ships, and one into a bathing and delousing ship. After losing the war, many ships from the DDSG fleet (16 passenger and 43 tug steamers, 452 barges, 2 tankers, 101 stationary ships, and the floating dock in Galaţi) had to be handed over to the shipping companies of the victorious states. During the crisis years of the 1920s, the management of the Óbuda shipyard seized every opportunity to obtain orders and provide work for the employees of the factory. Despite the crisis, the shipyard completed the largest, still fully steam-powered Danube tug steamer, the 2,500-horsepower ÖSTERREICH in 1928.
The situation changed by the mid-1930s, when the British investors who had acquired property after the war were replaced by investors supported by the Italian state. To take advantage of the then increasing demand for shipbuilding, the DDSG launched a modernization program, which was expanded with additional objectives under the National Socialist leadership after the Anschluß in 1938. Significant shipbuilding also began at the Óbuda Shipyard, to which additional military orders arrived after the outbreak of World War II. In addition to the three passenger steamships completed on Bulgarian order, tank barges and four KT (Kriegstransporter) transport motor ships were also built here to fulfil the needs of the Eastern Front. Furthermore, the ANDREJ HLINKA (1942), a diesel-engine paddle-wheel tug built for the Slovak Danube Steamship Company (SDP) was also completed here.
During World War II, everything that had been developed and built over the previous two decades was destroyed. The floating dock in Óbuda was dismantled and transported by Soviet troops, and after the peace treaty Hungary as a defeated state, was obliged to make reparations. During reparations, countless ships were completed, repaired and built to meet Czechoslovak, Romanian, Yugoslav and Soviet needs.