Dust Tactics: Steel Guard Fire Support Squad – "Steel Wall"

Description from the publisher:

The soldiers of the Steel Guard are battle-hardened veterans who have been gravely wounded in combat. These guys now have the chance to fight again, thanks to the latest Sino-Soviet Union technology for human enhancement. Their broken bodies are placed into a steel sarcophagus, which becomes their sanctuary. It keeps them alive and, most of all, keeps them fighting for the Motherland.