You can purchase this stunning cape at the top in the Varrock Museum for OSRS gold. The funny thing is that if you will try to get the Completionist cape, you'll become a random animal. It's a fun prank isn't it? However, you don't have to be concerned - this type of trick won't occur to you if you will fulfill all the prerequisites to be eligible for the cape.
What's next following an Completionist cape? The answer is that you'll get more quests and jobs. There will be some more conditions and you'll also be able to get this cape. Trimmed Completionist cape.
To get a trimmed version of a cape, you will have to do some miniquests, a lot of specific killings, locate a hidden treasure, unlock several new rewards and so on. All the requirements for the Trimmed Completionist cape can easily be found on the internet.
Each cape comes with its individual advantages, of course. I believe that one of the advantages of this cape is that it can showcase to other players your achievements. Simply by walking around the RuneScape world with this Buy RuneScape gold you'll know that everyone will admire you.