Commandos: Behind Enemy Lines

Commandos: Behind Enemy Lines is a real-time tactics game set in World War II that puts you in command of a small squad of elite troopers. Send them behind enemy lines on a series of hazardous missions, and bring them back alive. Clever strategy has never been so furiously action-packed. Study the enemy's movements, develop a careful plan, synchronize your men, and launch them on a swift and fierce attack using all your power and skill.

• You control 6 individual commandos each with a unique combat skill set.
  
• Thwart the German war machine by means of sabotage and tactical genius.
  
• Zoomable isometric camera allows for up to 6 simultaneous camera angles.
  
• 20 missions throughout Europe and Northern Africa.
  
• Co-op multiplayer mode on a LAN or over the internet.

The Green Beret recommends other games from Kalypso Media

https://store.steampowered.com/app/1100410/Commandos_2__HD_Remaster/
https://store.steampowered.com/app/373930/Sudden_Strike_4/