How do I get the 75% steam coupon offer thing?

[rdn2k10]

I got steam since I first got football manager, which was Football Manager 2010. Just like to know how do I get it as I'm planning to buy Football Manager 2014 for the summer because I'm bored and just finished uni for the summer.

 

[WJ]

The discount vouchers we received expired in May, I think, so your best bet would be to look for sales happening somewhere and pick it up for a discounted price.