Do you remember ice tennis? It's tennis placed on skates on an ice rink. Ice football is similar in that it is American football* except played on an ice rink. No, the players aren't wearing skates. They're wearing shoes instead of skates and hockey gear in addition to football helmets.
A 2024 article in the Huron Daily Tribune describes this innovative sport that is popular in Germany. The gameplay is thrilling as the athletes battle on the frozen gridiron, but also comical as they fall and slide on the ice easily.
-via Washington's Ghost
*Maybe in Europe they call it soccer. I don't know.