Because of Reforged, you can’t buy original Warcraft 3 right now
Warcraft 3: Reforged will rework the 2002 original with new visuals and other changes, and will also include access to the old version of the game. If you’re hoping to get your nostalgia fix ahead of Reforged’s release, though, you’re currently out of luck. The only Warcraft 3 item you can get on Battle.net right now is Reforged, and there’s currently no way get access to the original.
Reforged pre-orders are supposed to get you keys for the original Reign of Chaos and Frozen Throne, but unspecified delays are keeping those keys from going out. Blizzard support says “Access to the games will be available at a later date to players who pre-purchased Warcraft 3: Reforged, but we currently do not have an ETA.”
If you already own OG Warcraft 3 via Battle.net, you’ll still have access to it there – this problem is specific to new purchasers. Though it’s a temporary issue, it raises some questions about how we’ll have access to the old game in the future. The support message suggests that access to the originals will be a pre-order bonus for Reforged players, and that implies it won’t be a wider giveaway (unlike StarCraft) or available separately.
Key word ‘implies’ – we don’t know how or if Blizzard will keep distributing original Warcraft 3 following Reforged. Blizzard’s general done right by its remasters, and the new release will likely end up being the definitive way to play, but hopefully we’ll still be able to pick up the old ones for posterity’s sake. Multiplayer will be backwards compatible in the new release, so it makes sense to keep the old versions in circulation.
Warcraft 3: Reforged launches some time next year, and pre-orders start at around $30 USD.