Too much focus on multiplayer.
Remember when Crystal Dynamics announced a multiplayer mode for Tomb Raider just a little while back? And remember how everyone on the internet went crazy and got really angry? Yeah, this probably won’t help.
The Achievements list for Tomb Raider has been leaked online, and there’s a lot of focus on the game’s multiplayer mode. There are a total of 15 Achievements that rely completely on multiplayer, and while that’s not even the majority of the multiplayer, it could still put a few people off, seeing as Tomb Raider is supposed to be a single player focused game that develops Lara’s character.
A few of the Achievements require you to do stuff like reach the max rank in the multiplayer (Lvl 60), or kill a zip-lining enemy, or kill 20 players with a turret.
You can get the full list of Achievements at Exophase, which is where it was first uncovered.