Perfectionist Achievement in Hitman III
Complete Suit Only and Silent Assassin Challenges on The Icon, A House Built on Sand or Landslide.
How to unlock PerfectionistNote: If you have previously unlocked this achievement in HITMAN 2, and if you transfer your progress over, this achievement will unlock as soon as you launch HITMAN III. Refer to the roadmap for how to transfer your progress.
The easiest mission to do this on is The Icon. Difficulty doesn't matter, so play on Casual so you can make liberal use of saves. Refer to the following video walkthrough, courtesy of MrFreeze2244, to see an effective way to complete this mission. One thing to note is that every single time I did a takedown of the target from inside his trailer while using the wall as cover, it caused his body to teleport out of the trailer to a random spot on the map. I'm not exaggerating. The only way I was able to avoid this was to not use the wall as cover, but maybe you won't encounter this odd bug.