Hello there!
Three classic Blizzard games are now permanently free.
However, they are (currently) not listed anywhere on the Blizzard store. (This may be deliberate, could be a bug or they just haven’t got around to updating their store).
These will be downloaded directly through the official Blizzard website, as opposed to through their Battle.Net launcher.
Blackthorn
In Blackthorne, players take on the role of Kyle Blackthorne, a lethal commando equipped with brute strength, animal cunning, and a mysterious past that he has just begun to remember. Thrown onto the futuristic planet of Tuul, Blackthorne must contend with a world overrun by mutant monsters and goblin hordes in a valiant attempt to liberate the Androthi people.
The Lost Vikings
In The Lost Vikings, players must employ the skills of 3 unique Viking characters cooperatively to solve puzzles, conquer enemies, and navigate their treacherous voyage back home. The game provides hours of arcade-style action with over 35 levels, numerous enemies, and hundreds of mind-bending puzzles to solve. In order to advance through levels, players must learn to master the abilities of the powerful runner Erik the Swift, burly defender Olaf the Stout, and the unyielding swordsman Baleog the Fierce. As the adventure continues, players will encounter many different worlds to explore including Prehistoria, Egypt, The Great Factory and Wacky World.
Rock N Roll Racing
Featuring multiple racetracks and a classic soundtrack, Rock N’ Roll Racing puts players behind the wheel for an over-the-top demolition-racing experience. In the game, drivers take their pick from a variety of cars, each equipped with a selection of weaponry designed to help them outmaneuver the competition. Taking advantage of the Game Boy Advance Game Link® cable, players can also go head-to-head against each other for fast-paced multiplayer action.
More information plus screenshots for these freebies are found here: https://www.blizzard.com/en-gb/games/legacy/
Enjoy. 