As one of its daily deals, Green Man Gaming takes up to 75% off a selection of Mortal Kombat downloads for Windows. Even better, take an extra 20% off via coupon code "U9OULG-XRTO1V-4VMUGZ". Deal ends October 21 at noon ET. The deals, with price after coupon:

Mortal Kombat: Arcade Kollection for PC for $2.49 (low by $8)

Mortal Kombat Komplete Edition for PC for $4.99 (pictured, low by $15)

Mortal Kombat Arcade Kollection and Komplete Edition Bundle for PC for $7.49 (low by $22)

Note that a Steam account is required to download and play these games.