Resident Evil 6

Story achievement, can't be missed. It unlocks after the cutscene in the mall in chapter 1 on Leon's campaign

Story related, can't be missed.

You get this a bit after the big boss-fight in the chapter, after you climb the stairs and see the next cutscene

Another story-related achievement. As the description says, you get it after you complete the 3rd chapter in Leon's campaign.

This happens when you get out of the caves, and the characters talk about going to China

To get progress towards this achievement you have to either help a teammate that was downed or by going near them when an infected is attacking and rescue them by killing it.

It rarely happens that AI partners need rescuing, so I would recommend doing this with a real person

The description is pretty self-explanatory.

The tutorial is the "first chapter" in the game. Play through it to find out how the controls in the game work. The achievement should pop before you get back to the main-menu after the cutscene

After seeing the last cutscene in the lab underneath the cathedral, the chapter will end and it will unlock this achievement.

It is a main storyline cheevo, so not missable

Simply kill 500 of the infected. Their type doesn't matter; I for example got it while killing one of the big and fat zombies.