I have 3 Worms games here, and plan to buy Worms World Party Remastered.

However, its review is quite bad.
Could I get the original version of WWP if I buy the Remastered one?

Can you say for sure that it doesn't run worse than the original? Does the original have the same performance problems? If not, then WWP Remastered isn't such a bad purchase on GOG after all, since Worms Armageddon is more expensive here. I would definitely wait for a sale, though.

I can't remember I had any problems with the original and I haven't had any problems with the remaster. Maybe I'm lucky? However I would say that the difference between the both games aren't that much, it is essentially the same game.

Well, thanks. Someone wrote in the game specific forum that the Remastered version were unplayable. Maybe that person depends on a high frame rate and the original game wouldn't have been playable for them either. Needless to say, the original game was playable.