This is a great adventure map I stumbled upon. It's pretty challenging and a lot of work went into it. On the videos the guy does voice-overs to the story. It also has it's own achievements. Oh and what I meant to say by "challenging" is...it's fucking tough! Check out the official thread for more info. http://www.minecraftforum.net/topic...-the-sky-audio-voice-over-for-story-14000-dl/ [video=youtube;-np1xW2t5YY]http://www.youtube.com/watch?v=-np1xW2t5YY&feature=player_embedded[/video]
Through the Texture Packs and Mods system, you can add custom Achievements, Achievement Icons, and a custom Achievement Screen, so I would assume that the map author utilized that.