This guide include all 7 hidden and 16 DLC achievements. You will find them in the right section, sorted by alphabetical order supported by additional advices. DLC's are sorted by publishing date.

The achievements can be achieved on official servers, but some of them can be also achieved on community servers. Official servers managed by Facepunch are featured with special banner. You don't need to own DLC's personally to unlock achievements.

Notice: The choice of Australian or American low populated servers can make it easier for you to get the achievements.


One of the official servers

https://steamproxy.net/steamstore/app/252490

Hidden achievements in alphabetical order (7 achievements).

Giddy Up!
Ride a horse for 1km.


Glutton
Completely fill your food bar (up to 500).


I'm the Captain Now
Reach the bridge of the Cargo Ship.
Notice: You can achieve this on community server.

Cargo Ship only spawns periodically. It circles the map once, then leaves the area.

On The Deck
Land a minicopter on an oil rig Helipad.
Notice: You can achieve this on community server.

Make sure the Oil Rig contains a locked crate protected by scientists. You can kill scientists with scope from boat before trying.
The Minicopter can be bought from the helicopter vendor in Bandit Camp for 750 Scrap.
You can earn this achievement as a pilot and passenger.
Personally I got this achievement on EstoRust server.


You can practice minicopter controls on Easy AimTrain server

Save the Planet
Recycle 5 empty cans at a recycler


You can recycle an empty can of beans or empty tuna can

Sealbreaker
Completely fill your hydration bar (up to 250).


Something of a Scientist Myself
Kill 5 Scientists.
Notice: You can achieve this on community server.

Just kill any scientists by the road or in the monument.

Achievements from Instruments Pack DLC in alphabetical order (2 achievements).

Musical Maestro
Play every instrument.


You can play midi files located in the instruments folder from the main game directory using command instruments.playrecording DotA.[rust.facepunch.com]Make sure that you added the midi files to the indicated folder previously.

List of all instruments in the game:

• Acoustic Guitar (non-DLC instrument)
  
• Canbourine
  
• Cowbell
  
• Jerry Can Guitar
  
• Junkyard Drum Kit
  
• Pan Flute
  
• Plumber's Trumpet
  
• Shovel Bass
  
• Sousaphone
  
• Wheelbarrow Piano
  
• Xylobones

List can also be found on the DLC Instruments Pack store page below.

Getting the Band Together
Join a team of at least 4 people where everyone has instruments equipped
Note: Hidden achievement.

All players must be team members. To create team use "Create team" button under Tab and invite nearby players by pressing E button at their characters. Other players have to confirm invitation under Tab. You can complete this achievement together with Cool Kids Club, which also requires 4 players.

https://steamproxy.net/steamstore/app/1174370

Achievements from Sunburn Pack DLC in alphabetical order (7 achievements).

Cool Kids Club
Be in a team where every team member is riding a Boogie Board or Inner Tube (minimum 4 members).

You can riding a Boogie Board or Inner Tube at sea and in the river or craft above ground pool with walls and roof around (requires at least 3x5 foundations).
You can complete this achievement together with Getting the Band Together, which also requires 4 players.

Liquidator
Get a kill using a water gun.


Make sure both players have a water gun in hands. To complete this achievement player must be wet so you can make an attempt near or directly in pool, sea, river or snow area. You can use Water Pistol as well.

No Pressure
Get a kill with a super soaker pumped at the lowest pressure.


As described above and only reload once with r while trying. Make sure you are fast enough, the other player can die at 1hp before you can soak him.

Paparazzi
Take a photo of another player.


Radical
Splash another player with a Water Pistol while that player is irradiated.


You can use any radiated monument for this achievement.

Soaked
Soak another player above the damage threshold using a water gun.


Sunglasses at Night
Equip a pair of sunglasses after the sun goes down.
Note: Hidden achievement

Make sure it's late enough.

https://steamproxy.net/steamstore/app/1353060

Achievements from Voice Props Pack DLC in alphabetical order (7 achievements).

Bad Neighbour
Use a megaphone while in another player's Tool Cupboard radius.


Full Collection
Play an instrument while floating in an Inner Tube while Boom Box play a radio stream.


To craft Inner Tube you need to own Sunburn Pack and Instruments Pack DLC's or someone who own these DLC's can craft requird items for you.

I can no longer see
Stare into a laser light for 30 seconds.


I should buy this Soundtrack
Listen to the Rust soundtrack from a Boom Box for 30 seconds.


Like Nobody's Watching
Dance near a playing Boom Box on an active Disco Floor.


On the Record
Record another player speaking onto a cassette.


Party Boat
Dance with 2 other players at the front of the Cargo Ship.


Cargo Ship only spawns periodically. It circles the map once, then leaves the area.

https://steamproxy.net/steamstore/app/1670430

About the guide:

• The guide was entirely made by me;
  
• Guide will be updated when new achievements are added;
  
• All the achievement icons, descriptions and Rust logos originate from the Steam database.

15/01/2021 update:

• Minor fixes

16/01/2021 update:

• Minor fixes

17/01/2021 update:

• Minor fixes

20/01/2021 update:

• Minor fixes

13/02/2021 update:

• Minor fixes

01/07/2021 update:

• Added Voice Props Pack achievements
  
• Updated content

04/07/2021 update:

• Updated content

If you have any questions or comments regarding this guide please feel free to leave a comment below.