There are 7 "endure Co-op" achievements, ranging from 1 to 7 min.
With practice these can be done alone or coop.
Doing these alone is possible but can become tricky with some hazards like "all the bass" (multiple fish) and especially past 200 second when 2 hazards happen at once and even 3 later on.

There are 2 Achievements requiring perfect play for 60 and 120 seconds. while im sure these can be done at any time, it makes sense to attempt these early on when hazards are slow, short and few in number

These achievements occur naturally as the game progresses beginning from about 200 second. These can be unlocked passively while completing the endure co-op achievements

There are 5 dance related achievements.

Lights. Music. Dance. and Lights. Music. Dance. Partner. are completed by dancing with 1 and 2 players respectively, but only when the R.A.V.E hazard is active

Three-step dance and Four-step dance are completed by dancing with 3 and 4 players respectively, but aren't require to be during the R.A.V.E hazard.

DANCE! is completed by dancing while using the giant power up, no R.A.V.E hazard needed

The 3 achievements related to hitting the bass require the bass be hit 250, 500 and 1000 times.
This is a combined total of hits and does not need to be in one game. This one will complete naturally once a few games have been played.

All remaining achievements are unique and require unique solutions

Reach for the stars.
Hit a bass until it hits the top of the play area. This will probably happen naturally during play, most likely with the space hazard or enlarged bass

Trigger a Sudden Death.
This one is simple enough, if it doesn't happen naturally then it can be easily done by simply playing SLAP VS and stay akf for the duration of the match (usually 1 min)

Dive and save the Bass while the floor is ice.
While the chillstep hazard is active, hit the bass with a dive. Most likely to be achieved naturally

Inside the Radish Box.
Simply access the credits via the settings menu

Be quick, and quick again.
Grab a speed power up in SLAP VS, once another becomes available, activate, collect the new one then activate again

Play for a while.
Play the game for 1 hour. this only relates to the time the game has been open. while it can be got by going afk in the menu, it doesn't take long to achieve while playing

Become an item connoisseur.
This is unlocked by using every item once. while its easy to farm items in sudden death on SLAP VS, its necessary to play ROULETTE VS as it has an item unique to that game mode (+1 life item)

A long victory celebration.
I believe this is unlocked by dancing after winning a tournament and continuing to dance past the throne splash screen and back to the menu.

Hit one bird with one stone
I believe this is completed by using the head item (the square head item used to hit other players)
hitting someone once with it should unlock this

Hit two birds with one stone.
This is unlocked by using the ball and chain item but you must hit two players at once.