These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Shin Megami Tensei I
Darkness-Induced Audience Apathy: When the world slowly grows more and more crapsack and the canon route involves murdering nearly everyone do you honestly think any of the characters deserve to win? Then again it could be Fridge Brilliance to show that even the Neutral path can be just as bad as Law and Chaos.
Game Breaker: Zio's many forms stun almost everything in the game. With high enough speed, the heroine can immobilize pretty much everything before it even has a chance to move. The Bufu line of spells works just as well, but you need demons for those.
Player Punch: Not too long after the game begins, at one point you come home and, naturally, visit your mom. What seems like typical mother-son banter takes a turn for the worse when she starts coming off as extra-affectionate towards you. One of your allies warns that this is a sign of something weird. He's right; it's actually a demon in disguise. A demon that had just eaten your mother. You then have to avenge your mother's death and whoop his ass.
Seinfeld Is Unfunny: The game was truly revolutionary in its treatment of the post-apocalypse, demons, morality and the like... and everybody in Japan proceeded to rip them right the hell off, from Neon Genesis Evangelion to Super Robot Wars to Soul Eater (the latter being a kind of Lighter and SofterDeconstructive Parody, that's how far we've come). Seeing what made the original game so unique can be somewhat harder in this day and age. The gameplay also suffers from this in a huge way - in 1992 the first-person dungeon crawling was relatively unique in execution. For anyone used to post-Quake 3D navigation or PS2-era and beyond user interfaces, though, the game will want to make you tear your eyes out in frustration over how clunky it is. The mapping feature itself requires you to open two menus alone.
The Playstation version lessens the gameplay element of this a little, with interface improvements and graphical upgrades.
The years have not been very kind to the game as well, the game's combat and leveling up are pretty bare bones compared to Nocturne's.
When your mother gets eaten by a demon who then disguises itself as her, very early into the game.
In ALL routes, both of your friends' deaths. In Law or Chaos, the one you aligned with is killed off either by an artifac too strong for him, or by the friend you didn't align with. Said cross-aligned friend has to be fought and killed. In the Neutral path, you kill both of them yourself.