This is an adventure game in which the evil alien Queen Angeleeka has kidnapped the great and mighty Reptar (read: baby Tommy's Reptar action figure). You'll play as the baby gang fight to save Reptar, the only one who can best the evil alien menace. Daunting tasks are before you, even getting Angelica herself to help you.
You'll have to accomplish a variety of puzzles with only your wits and an inventory of useful tools in your diaper inventory. The Rugrats checklist reads something like:
The game's manual is in the CD and so, at least for the Windows version, is a complete walkthrough, so if one's own rugrat get stuck at some point it's possible to put them on the right track and score hero(ine) points at the same time. Nice touch.