using the code PROMO-FESTI-VAL20
you can pre-order the following from GMG
for 20% off:
the code expires April 16th, so I imagine there may be more games added to the list. it says you can use the code multiple times, but I think you need to checkout separately for each one because it only applies to one game in the cart, and re-adding it says the code has already been used.