Achievements awarded for defeating any of the five gatekeepers.

DEFEAT THE ARMORED GATEKEEPER

The Armored Gatekeeper isn't too far into the game, this should be pretty easy.

DEFEAT THE OVERGROWN GATEKEEPER

Overgrown Gatekeeper is the boss of the second area, another easy one.

DEFEAT THE CARNIVOROUS GATEKEEPER

The flesh area is to the left of the overgrown area, which is where this boss is.
Note: This boss is evil holy crap this was the hardest boss by far for me.

DEFEAT THE PHANTOM GATEKEEPER

Another required boss, this one to the right of the overgrown area.

DEFEAT THE ULTIMATE GATEKEEPER

After you've defeated all other gatekeepers, head upward in the center of the map to unlock the area that the Ultimate Gatekeeper resides in. Functions as the final boss.

Achievements that you get from you getting a better time score, exploring more rooms, etc. over the course of your playthrough.

WALK 10K STEPS

If you're going for 100% or otherwise, this will unlock itself by you just playing the game.

SURVIVE 60 SECONDS IN ANY ROOM

There's a couple rooms in the game that you can do this in easily, namely the room "The Aging Process" in the flesh zone. Remember you have a fast forward key! "Q" on keyboard and "L1" on controller.
Note: The name and icon of this achievement is a reference to the devs’s other game Minit! Cool right? :v)

DIE FROM ALL DISCS IN ONE ZONE

If you're aiming for 100%, this will come along the way. Otherwise go to the first area and try and find all of the discs there, it's not that hard.

DIE FROM ALL DISCS

I'm not gonna tell you where all 64 different discs are in the game as that would be waaaaay to much for this one guide. But if I do a separate guide for this achievement I will link it here.
Not too many discs are really hard to find outside of the ones locked behind puzzles so you might be fine without a guide. I believe in you.

EXPLORE ALL ROOMS

Does not count ???? rooms. You'll get this over time by generally being a completionist, and going in new rooms when they open up.

EXPLORE ALL ???? ROOMS

???? rooms only unlock after meeting very high requirements. There are only eight of these rooms in the game, and only appear on the map when you've met the requirements, so make sure to check the map every once in a while to see if you've happened to meet one of the requirements.

The requirements of each of the eight rooms are as follows:

• Defeat 5 Gatekeepers
  
• Unlock 6 different abilities
  
• Explore 44 hard rooms
  
• Survive 999 second in total
  
• Die from 64 disc types
  
• Explore 50 rooms
  
• Survive 20 seconds in 55 rooms
  
• Survive 10 seconds in 44 hard rooms

All of these are self explanatory, but if you still need help, the answer is somewhere else in this guide.

SURVIVE 20 SECONDS IN EVERY ROOM IN ONE ZONE

Relatively easy to get in the first zone.

SURVIVE 20 SECONDS IN EVERY ROOM

This one is pretty hard. Really I don't have much to say other than good luck bud. Also this achievement does not count ???? rooms, as the requirements of one of the rooms is to get this achievement.

UNLOCK ALL 6 ABILITIES

The discs that grant each of these abilities are as follows:

• Dash is given by the dasher disc in the "Blades Runner" room
  
• Slow is given by the slower disc in the "Greenhouse" room
  
• Clone is given by the replicator disc in the "First Blood" room
  
• Absorb is given by the ghost disc in the "Infrared" room
  
• Blast is given by the phase disc in the "It's Just a Phase" or "Scientific Method" rooms
  
• Mirror is given by the golden mirror disc in the "Binary Orbit" golden room

The first time you die to any of these discs, the ability will be given to you.

Achievements that involve the hard mode of the game.

START HARD MODE

After you beat the Ultimate Gatekeeper, the ending cutscene will play and the credits will roll. After that, you will have the option to start hard mode. Say yes to this and you will now be able to play hard mode, along with have the achievement.

COMPLETE HARD MODE

After making it to bottom of the map in hard mode, you'll enter the same hole you came out of at the beginning of the game, the final cutscene will play, and the achievement is yours.

EXPLORE ALL HARD ROOMS

If you're being diligent about exploring rooms and stick to it, you should have this in no time.

SURVIVE 10 SECONDS IN EVERY HARD ROOM

This isn't as bad as it sounds, as most hard mode rooms require you to 10 seconds anyway (or more in some cases). Again just keep at it, you'll get this eventually if you try.

SURVIVE 20 SECONDS IN ANY HARD ROOM

This is difficult but doable. I'd say the easiest time you'll have is trying this in the room named "The Aging Process", or maybe some of the darkness zone rooms. Really, just do whatever room you're best at. You'll get it eventually.

Achievements that involve the various gold rooms throughout the game.

DISCOVER THE FIRST GOLDEN ROOM

The first golden room: "Star Map", can be found at the bottom right of the map, connected to the first zone in the game. The room requires you to die to 15 different disc types before entering. Should be easy enough to do in the first zone in the game.

DISCOVER THE SECOND GOLDEN ROOM

The second golden room: "Rare Element", can be found at the bottom left of the map, connected to the flesh zone in the game. The room requires you to die to 30 different disc types before entering.

DISCOVER THE THIRD GOLDEN ROOM

The third golden room: "Binary Element", can be found at the top right of the map, connected to the darkness zone in the game. The room requires you to die to 45 different types of discs before entering.

DISCOVER THE FOURTH GOLDEN ROOM

The fourth golden room: "Golden Frequency", can be found at the top left of the map, connected to the final zone of the game. The room requires you to die 60 different types of discs before entering. You'll probably be well into the final zone before you unlock this.

UNCOVER THE GOLDEN MYSTERY

Thank you to Radical Dylan for pointing out the exact conditions that the orb appears in! You're a real one Dylan, thank you!

The Voyager achievement requires you to pick up an orb that spawns in the "Star Map" golden room.

The orb appears when you've discovered and died to all of the golden disks in the game. Most of these disks should be easy enough to find by just exploring all of the rooms and seeing wheres there's rooms with disks you've missed, but some of these disks require you to complete a puzzle first. Some of these puzzles are detailed somewhere else in this guide, and some of these puzzles are actually located in each of the golden rooms. As always I encourage you to try and figure these out for yourself first.

! PUZZLE SPOILERS AHEAD !

Rare Element

In the second gold room you'll need to activate symbols on the ground by bouncing the two discs off of the same wall with the blast ability.
Each disc corresponds to a symbol, and one of the discs bonking a wall a second time shuts it off.
aim to blast both discs toward the southern wall, and kinda juggle them back to it when they approach the northern wall. Making it so that when the first disc bounces off the wall, the second can also bounce off the wall before the first can reach the northern wall and deactivate the symbol. Completing this puzzle allows you to die to the next golden disc.
Stick to it, this could take some time.

Binary Element

In the third gold room you'll need to die to the disc that mirrors your movements.
Use the clone ability while walking to distance yourself from the clones you make. Then run one of your clones into the disc, as the disc only mirrors one of the instances of the character. Completing this puzzle gives you the mirror ability and the next golden disc entry.

Golden Frequency

In the fourth gold room you'll need to detach wall discs from the walls to light up symbols on the ground.
You can't use the blast ability to detach the wall discs as it will leave one symbol unlit. Instead use the absorb ability to absorb one of the wall discs in the room, then die and reset the room. you now have access to the two wall discs in the room and also the one you absorbed in your previous life. Now let go of the third wall disc, then absorb and release the other two discs to make the symbols light up. Completing this puzzle allows you to die to the next golden disc.

When the orb appears, pick it up and it will play a cutscene. After that, you'll have your achievement.

Achievements that relate to you having to do some sort of puzzle to be awarded them.

! PUZZLE SPOILER WARNING FOR THESE !

FOLLOW THE PATH

In order to find the secret in the "Timeless" room you must find and input a code. Finding that code goes as follows:

As the description of the achievement implies, you first have to go to the room to the right of "Timeless", a room called "The Path". As soon as you enter, discs will spawn moving in different directions as they do. The order and direction they are when they spawn is a code. All together, the code spells out:

left, down, down, left, up, right, up.

Now that you have the code you need to input the code. First die in this room. Now that you have the room select hud up, input the code by moving to rooms in the order of the code. Don't try this in the map screen in the pause menu as it won't work. When you finish the code, you should be looking at the "Timeless" room. Enter the room and you have your achievement. You also get to a new disc too.

FEED ???? 4 ????

Try figuring this one out on your own if you can.

Feed teeth 4 bodies is the translation for the description.
Go to the "Rotted Antibody" room with the clone ability equipped. Then after collecting some orbs, start spamming the clone ability. Go to a corner to bunch up at least 4 of your clones into a group, then let the teeth enemy eat them. Do this 3 more times and you unlock the southern room, and the achievement.

???? THE ????

Again, try figuring this one out on your own.

Flip the floor or something like change the floor is the translation for the description im not sure.
Go to the "Safety First" room. You'll need to use the dash ability to step on some floor tiles while avoiding others. Step on all of the tiles around the edge, EXCEPT for the 2 on the complete left and right sides of the room. Then lastly step on the middle tile, dashing over the tiles in between. The northern room should unlock and the achievement is yours. The room "Danger Zone" has a similar puzzle where you step on the tiles between the outside and innermost tile. Doing that nets you a new disc to die to.

Achievements that don't really fit into any other category.

DIE FROM 4 DIFFERENT DISCS IN ONE LIFE

Go into a room with more than four disc types with the clone ability equipped. Spam clones and just run them into as many discs as you can while keeping one alive.

HOLD DOWN FFW FOR 10 SECONDS STRAIGHT

Easiest room to do this in is "The Aging Process" in the flesh zone.

DEFEAT AND REVIVE AN ANTIBODY

Go to a room with any antibody enemy, and keep collecting orbs until they die, and are resurrected after enough orbs are collected.

END A RUN FROM THE MAP

While still living, pause the game, open the map, and enter a different room. You die in the process.

FACE THE GOLDEN CARCASS

Defeating all four antibody enemies back to back will allow you to enter the "Golden Carcass" room north of the "Brutal Antibody" room, and encounter the golden carcass.

SURVIVE 0 SECONDS OR LESS

As soon as you spawn in a room, hold down the ability button while slow is equipped and walk into where an enemy will spawn. If done correctly, the timer will not count up past 0:00:000. This will also unlock the "Stay Sharp" room.

QUIT TO MAIN MENU WITHIN 2 SECONDS AFTER DYING

I feel for the people that got this achievement without trying to. :v(

DEFEAT THE ULTIMATE GATEKEEPER USING EVERY ABILITY

After you beat the Ultimate Gatekeeper the first time, go back after the credits roll and simply beat him again with the other five abilities.
This will take you some time, good luck.

I hope you have a fun time trying to 100% Disc Room! I know I had fun. I also hope I could help some people with puzzles and tips and what not. This game is so awesome it's a shame not more people are talking about it.

Again thanks to Radical Dylan for the help with the Voyager achievement, as I had literally no way of knowing how to get the achievo without playing through the game again, which I wasn't gonna do. I would smooch you on the cheek if I could Dylan! Thank you!

Anyway, give this a good rating if you like, and thanks for reading.

Good luck!