SEAL Team is a Vietnam War video game which was released by Electronic Arts for MS-DOS in 1993. It was the first ever tactical shooter game. The game uses 3D vector and bitmap graphics of the modified LHX: Attack Chopper game engine to recreate 80 historical operations of the four-man US Navy SEAL teams in the Mekong Delta area of Vietnam. The game featured an unprecedented amount of realism and is referred to as "tactical combat simulation" by IGN.
You were able to play a Seal team member through various years of the war, with equipment and weapons evolving over the years (for example, some weapons like the M16 weren't available in the early years of the war).
It featured a realistic damage model, far ahead of its time. Stray bullets could damage individual pieces of equipment, leading to scenarios like being pinned down in a riverbed with your squad uninjured but your radio trashed, preventing you from calling in air support (a situation I once found myself in, still imprinted into my brain 30 years later).
This is a game that is in desperate need of a modern remake.