The Halo Reach's custom game unlocks achievements.

Before starting, I apologize for my english.

Greetings.

I am saddened to introduce myself to the forum posting about a fatal error. But, the bug seemed so, so serious to me that I have been obliged to report as soon as possible.

Perhaps on another occasion I will introduce myself properly. Let’s start with the matter.

There is a bug in Halo Reach custom games.

There is a bug in Halo Reach custom games. When I enter the menu to start a game, if I don’t start anything and exit to the main menu, the misions / multiplayer played counter increases abruptly.

This has caused the achievements of playing 500 misions / multiplayerto be unlocked automatically, without me looking for it. It seems to me a very serious error that should be corrected as soon as possible.

Achievements of 200 games, 250 games, 300 games, etc … were unlocked.

Extra information:

  • I used to play the entire collection on Xbox One with Game Pass.
  • I play on Steam and I only have purchased Halo Reach and Halo CE.
  • Two days ago I asked a friend to lend me his Steam account where I had the complete collection. In order to play Halo 3 with my Xbox Live account and meet Halo 3 challenges.
  • The error occurred while playing on my Steam account, where I only have Halo Reach and Halo CE.

P.s.:

I am concerned that Microsoft may think that I have done some kind of trick and all my achievements have deleted. I would like to repeat that I have not done anything voluntarily.
I would not like to lose my achievements after more than 10 years playing.