Mission 9 The Only Easy Day... Was Yesterday
There are multiple slow-mo breaches during this level. The easiest is the first one, as this is the game's introduction to the mechanic, and has more than four enemies. Simply focus on your accuracy to eliminate four enemies with four bullets. Reload the checkpoint as needed.
Here is a video guide with English commentary!
Here is a playlist of guides for this game!https://www.youtube.com/playlist?list=PL-HeW6XkKdUK97oYVSMU7...