If I buy this, can I get 1 and 2, 3 for each games?

[waa]

Get each game on my library

or

all games including on BFG editon 1 game?

[SpunkyJones]

All are in the 1 game.

[Henrimagne]

Yes, it will be 1 game (DOOM 3 BFG) with the other games (1 & 2) and the expansions of 3 (RoE + LostMission) in the game menu.