DOOM 3 BFG Edition is the ultimate collection of games that defined the first person shooter including DOOM, DOOM II, DOOM 3, and DOOM 3: Resurrection of Evil, and The Lost Mission.
Key features:
A Classic Remastered:

Developed by id Software, the original team responsible for the franchise legacy, DOOM 3 BFG Edition features Steam Achievements, improved rendering and lighting, and a new checkpoint save system allowing for smoother progression through the game. id has fine-tuned the controls to bringing even more intensity to the DOOM single and multiplayer experience and all DOOM 3 games now feature the new armor-mounted flashlight, allowing players to illuminate dark corners and blast enemies at the same time.
Stunning 3D Visuals:

DOOM 3, Resurrection of Evil and the all-new ‘Lost Mission’ have all been optimized in stereoscopic 3D (on supported hardware), further immersing the player in the demonic world of this terrifying horror masterpiece.
The Lost Mission:

DOOM 3 BFG Edition includes an all-new chapter in the DOOM 3 experience – ‘The Lost Mission’, featuring eight heart-pounding single player levels and a completely new storyline that will have players once again on the edge of their seats.
The Ultimate Collection:

As a special bonus, DOOM 3 BFG Edition will also include the original DOOM and DOOM II games, making it the definitive collection of the revolutionary games developed by id Software, the studio that pioneered the first-person shooter genre.