not so much completionist but definately Long Play.. decided early on to start again and stick with a new map and avoid exploring beyond biomes not released.. Sadly it has one huge main island a few mountains and one swamp..no plains so a little sailing found trader and a few swamps and plains.. short story... since in game i have ALL ETERNITY to fight the mobs, im progressing at a snail pace..but have experimented with huge Star Forts and obligatory Terraforming, breeding and farming and enjoying the ambience the devs have created over 1400 in game days this world all vanilla.. like @Eightball [At this rate the new biomes will mesh nicely into my map with no restart needed.]