On May 1, 2021, the latest round of leading-edge large-scale projects began for users of the Gauss Centre for Supercomputing’s (GCS) three high-performance computing (HPC) systems—Hawk at the High-Performance Computing Center Stuttgart (HLRS), JUWELS at the Jülich Supercomputing Centre (JSC) and SuperMUC-NG at the Leibniz Supercomputing Centre in Garching near Munich. As part of the organization’s 25th Call for Large-Scale Projects, GCS leadership approved 1.6 billion core hours for research projects for 14 simulation projects that met the strict qualification criteria set by the GCS Steering Committee.