weirdest Achievement ever

Any of the netflix achievements on the XBOX ONE.

Newbie Reviewer(0G)
Rate 5 titles with the Netflix app

Big City Critic(0G)
Rate 25 titles with the Netflix app

Rampaging Reviewer(0G)
Rate 100 titles with the Netflix app

The Ultimate Opinion(0G)
Rate 250 titles with the Netflix app

Triple Play(0G)
Watch 3 episodes in a row on Netflix

Just One More Episode…(0G)
Watch 5 episodes in a row on Netflix

Can't Get Enough of This Show!(0G)
Watch 10 episodes in a row on Netflix

One Week Wonder(0G)
Use Netflix for 7 days in a row

Two Wild Weeks(0G)
Use Netflix for 14 days in a row

One Month Marathon(0G)
Use Netflix for 30 days in a row

In Torchlight 2 there is a tiered achievement for number of times you fish. The first level one for fishing 10 times is named Apprentice Baiter...

rising sun of Europa universalis 4 no one has ever gotten in... conquer europe as aztec nation

In Game dev Tycoon, that is a game about developing games, as the name of the game may sound.
When you first open the game, just before the tutorial, you've got an achievemnt "Support a young start-up. Buy the game."

The Simpsons (xBox)

Press START to Play (5G)
Easiest achievement...ever

rift: jumping from a bridge near the 1st big town.... achievment name: I did it once

Unachievable - The Stanley Parable
The way you get it changes every day, some people looked in the code and noticed it. And it's everyday a fucking weird way to get it. (Like: Save load and start a new game very fast without moving, that was the way I got it not long after release)

Deadpool-The Second One is Also Free

Most of the Eryi's Action's achievements. You need to die in every trap to unlock all them.

Deponia - Droggeljug