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