The eShop for the Nintendo Switch currently has discounts on some of the Doom franchise games:
DOOM (1993) - $1.49
DOOM II (Classic) - $1.49
DOOM III - $2.99
Sale ends March 2, 2020
DOOM (1993) - $1.49
DOOM II (Classic) - $1.49
DOOM III - $2.99
Sale ends March 2, 2020