Petko is an unreleased point-and-click adventure game developed by the Austrian company Max Design. It was originally planned to be released in fall 1995. It was re-announced by Tale Factory in 1998, and once again by Atmosphere Studios in 2003, but it never saw the light of day. The story is about a guy called Petko, who won a journey to San Rico Island.
In this video, you can see the playable demo version that was published in around August 1995.
Playable PC MS-DOS demo (1.0 MB)