King's Pawn Game is a chess opening with the ECO code B00. It goes 1. e4. White opens with 1. e4 (the king's pawn). After 1 move it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
In chessGM's opening book this position continues with 1... c6, 1... c5, 1... e6, 1... e5, 1... d5.
White opens with 1.e4, taking the centre and opening lines for the queen and bishop. This family holds rarer replies and side lines after 1.e4.
chessGM has a full course for this line: open the King's Pawn Game course lesson.