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StarCraft II: Wings of Liberty turns nine this year, a fact that’s both horrifying and just horrifying. Those of you who’ve been very patient are in luck though, as Blizzard celebrated StarCraft II’s longevity by making Wings of Liberty free in late 2017. Both the campaign as well as pieces of the multiplayer experience are now freely accessible through Battle.net, making StarCraft II probably the best free-to-play RTS available. The custom game mode (Arcade) is still free too, for those who prefer a less serious version of StarCraft II.
And if you already own Wings of Liberty but not the expansions? Blizzard will give you a copy of follow-up Heart of the Swarm instead. You’ll still need to purchase the grand finale Legacy of the Void, though.