Games like Codename: Kids Next Door - Operation S.T.A.R.T.U.P.

If you finished Codename: Kids Next Door - Operation S.T.A.R.T.U.P., the closest matches are Pepper Grinder, Hue, Carto, Snipperclips: Cut It Out, Together! and Monkey Island 2: LeChuck's Revenge. All 9 share its adventure genre and are ranked by how closely their themes and modes overlap.