Finish the game avoiding all H scenes except the first.

Theoretically the game can be finished without triggering any event except the first one, then unlock all of them after endgame. All achievements can also be obtained this way, just need to save/load for some of them.

Here is how:

Learn a skill from the "cosplayer" at the office district.

Obtain enough nutritional drink.

Defeat the enemy blocking the shopping district.

Go to the beach, two "cosplayers" there can teach a skill and give maxhp+1 everytime talking to them with the third option.

Take the rabbit girl job at office district, defeat the enemy, then distribute all the tissues at Sokuki
Building (Front). 50mil can be achieved by repeating this.

Go through the story line (finish any side quest and defeat any enemy) til all the five "heart bubble" npc appear at office district. Save, get the achievements, then load the game.

Collect enough materials to craft enough for the crafting achievements.

Gain at least 301 hp, then dismantle the patrol car.

Fix the robot carefully, finish the game.