Here is the full list of all 19 404Sight achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Triggered 42 inhibitors in level 12.
You saved the internet! For now...
Destroy 5 inhibitors with your sprint ability in level 7.
Jump over 10 times in level 7
Spend over 60 seconds total with max bandwidth in level 8.
Die 3 times due to running out of bandwidth.
Spend 15 seconds total in slow lanes in a single map.
Spend 24 seconds total in fast lanes in level 10.
Seriously, why?
Use the sprint ability 10 times.
Spend over 40 seconds total with more than half bandwidth in level 5.
Died from falling off the map a total of 4 times.
Died from running out of bandwidth.
Spend over 35 seconds total with less than half bandwidth in level 2.
You've survived the first level, more challenges await!
Used your sprint ability for the first time.
Died from falling off the map.
Spend 40 seconds total in neutral lanes in a single level.
Turn on and off your ping 50 times.