A new fix has been released for both BTCOD and BEL, you can watch the tutorial from the link below. Due to it's age most modern PCs will run the game impossibly quickly making it difficult to play, the Steam install also fails to correctly setup the game so you are unable to Load/Save. There are some important issues with the Commandos series. Here is the final fix for Commandos Behind Enemy Lines, Retail Version Running On Windows 10 64 Bit.
Thank you for all your patience and support.
Thing is that this game was running ok for me on win 7 圆4 but after upgrade to win 10 nothing work, even this BEL patch. Lead the 'Dirty 1/2 Dozen' behind enemy lines. If you have problems using a trainer in combination with Windows Vista, 7, 8 or 10 then make sure to run the trainer with Administrator rights and when needed in Windows XP or Windows 98 compatibility mode! Eidos Interactive Commandos: Behind Enemy Lines for Windows for Age - 14 and Up.