During a mission, look at the Game Bar (the interface bar usually located at the bottom or top of the screen depending on your version and resolution). You are looking for an icon that resembles a 3.5-inch floppy disk . This is the universal symbol for "Save/Load" functions in games of this era.
While some purists might frown upon it, "save-scumming"—saving before every single action—is often the only way to learn the game's hidden "rules". Because the game rarely explains which areas allow loud gunfights and which require absolute silence, saving allows you to experiment with different tactics, like using the Sapper's bear traps or the Marine's harpoon, without losing hours of progress. Modern Technical Hurdles how to save game in commandos behind enemy lines
If you are using a non-English keyboard, sometimes the Ctrl modifiers act differently. Ensure your keyboard language is set to English (US/UK) for the best compatibility. During a mission, look at the Game Bar
If you have ever spent thirty minutes meticulously dragging the Green Beret, Sapper, and Spy through a minefield, only to have them mowed down by a random German officer on a bicycle, you know the pain. You have also likely asked the most important question in the game’s history: Ensure your keyboard language is set to English