Here is the full list of all 26 Electronauts achievements.
Play a song in each visualizer at least once
Play nothing but the harp for 2 whole loops.
Use the arrangement equipment
Mute the kick/snare stems in a backing track and then bring them back in
Throw an audio grenade when you transition backing tracks.
Play only the pad synth for 2 full loops with all backing tracks muted
Sequence all notes on all possible sequencers on every instrument
Jam in a single room for 15 mins or more
Fill 4 rows on the arrangement equipment
Played multiplayer
Play an instrument consistently for 1 min
Use the remix beat repeat 25 times
Throw the audio grenades at your fellow electronaut
Have complete silence for 4 minutes and 33 second
Have delay enabled on all instruments and hold down the filter in FX cube for 2 loops.
Play 2 orb kits simultaneously for 2 full loops
Use the vocal equipment whilst recording a sequence on an instrument.
Have a sequence playing on every instrument in a room
Play only the synth ball for 4 full loops
Clear 3 sequences in succession
Mute 2 sequences at the end of a loop
Record a sequence on an instrument, mute it for a loop and play that instrument with your sticks for a loop then unmute it.
Play every note on the synth ball in ascending order
Play 20 different songs
Play every instrument type in the game
Throw a grenade and use the beat repeat to studder the grenade.