Credit to /u/ABOOD-THE-PLAYER.
Naturally, this anniversary calls for proper celebration. So starting today and until Sunday, the game is completely free and yours forever, if you just click 'Install Game' on Eador's Steam page in time. Tell your friends, share the news! Nothing beats free, right? Be warned though, Eador is notorious for eating your time like no other game — in a good way!
Interesting game, but only for hardcore gamers, not casuals.