Asterix the Gaul is the film adaptation based on René Goscinny and Albert Uderzo's comic strip series. In said series Rome has invaded almost all of Gaul. All but for one tiny village on the northern shores of the land, where the villagers still keep the legions at bay with the help of their druid Getafix, who knows the recipe of a very special magic potion, which is capable of increasing its drinker's strength to inhuman levels. The comic strip is a beloved children's classic in Europe and widely read by adult population as well. So a film adaptation was inevitable.
And in my opinion they succeeded pretty well. The film adapts the first album of the series, bearing the same name as the film, following its plot very closely. It's a simple story as far the adventures of Asterix and Obelix go, mainly meant to introduce the setting and the characters, but it's still filled with tons of humorous moments, outrageous characters and odd twists. It's nowhere near my favourite of these stories, but it's definitely head and shoulders above most of its peers.
What really keeps this movie from achieving a greater ranking is the animation, and to a lesser degree the music, which both show the constraints of the budget. The character designs are identical to the comic books, so no complaints there, but the film reuses its animation sequences heavily, the movements are either too jerky or too linear, depending on the scene, and the backgrounds, while nice, are a bit simplistic. The music has a few good moments, and I especially like the main theme, but it's nothing overly special.
Nevertheless, Asterix the Gaul is a good introduction into the world of Asterix and well worth a watch for all fans of humorous animation adventures.