Since I did the acheivement guide for fault milestone 1,
http://sp.zhabite.com/sharedfiles/filedetails/?id=447095138
I guess doing the same for fault milestone 2 side:above is inevitable.

Will make this short & simple =D
Only 9 acheivements makes this even easier.

If you start a new game to read, this will be your first achievement.
Literally unmissable, and you get it as soon as
the game self-reboots after Melano's overpowered attack crashes the game .

One of the best breaking-the-4th-wall moments I've seen in a Visual Novel, honestly.

A normal run reading the entire story should unlock these achievements in this order:
=========================================================
Usually one acheivement after the end of each chapter;
in case the acheivement icons doesn't make it obvious enough.

The last one (with the image of No.4) pops up after the ending credits.

Seems like the devs are incorporating meta-humor into these acheivements...

The full acheivement name "Seriously, this is not that type of game" is a self-reference to the same-type achievement back in fm1, where players thought fault was an eroge series and thus expecting heavy fanservice or lewd scenes..


After clearing the VN at least once to unlock the CG gallery,
go to the CG gallery and look for this image and choose it.
============================================================================

The legitimate method to get this achievement requires you to just leave the VN window static on this particular CG for a continuous 2 hours.

Due to the nature of this CG though, it might be risky for your social well-being if you live together with some other people and they walk in and see your computer during those 2 hours..

So here's an alternative shortcut method. Using it or not, is up to you =D

1) When you first play the CG from the art gallery, take note of your computer's time.

2) Set it to a later time, slightly less than 2 hours. (eg 1 hour & 57 to 59 minutes later)

3) Let the fm2: side above window be active on Topless Ritona CG for a few more
minutes.

4) Acheivement should pop up.
You may or may not need to exit the CG for the achievement,
by clicking on the CG after the 2 hours.

If you don't see the actual achievement notification through the fm2: side above window,
try checking the game's profile through your Steam library,
it should tell you that you got this achievement.

Side note

Be careful not to mess around too much with the VN window and your computer system's clock.

I somehow got this creepy looking image.

2 hours with Ritona, now 2 hours with another girl.
The CG below.