https://store.steampowered.com/app/323341/Oddworld_New_n_Tasty__Alfs_Escape_DLC/
Here you can buy the key Oddworld New 'n' Tasty - Alf's Escape DLC (addition to Oddworld New 'n' Tasty) at a bargain price. After purchase, you will immediately receive a key, activating which you will add DLC to the game Oddworld New 'n' Tasty to your steam account.
Without the original game Oddworld New 'n' Tasty on the account you can not add DLC Alf's Escape.
You can activate the key in any region.
Steam