Here is the full list of all 68 Runbow achievements.
3 medal all levels in the Prison map
3 medal all levels in Adventure mode
3 medal all levels in the Nightmare map
Beat all of Out of This World
Defeat Plunto
Beat the Bowhemoth
Beat all levels in Adventure mode
Beat all levels in the Prison map
Set the Fun type to Kawaii
Set the Fun type to Maximum
30 seconds in push zones
30 seconds in pull zones
Go through 20 portals
Beat all levels in the Nightmare map
Get the "Everyone Gets a Title" title
Get the Lightning power-up 10 times
Get the Swapper power-up 10 times
Land 5 Super Punches
Play Arena
Play King of the Hill
Play a game without anyone else scoring
Play 10 multiplayer games
Play 500 multiplayer rounds
Die 100 times in the Bowhemoth
Beat adventure mode and defeat Satura
Beat the boss in the Nightmare map
Beat the boss in the Prison map
Unlock every guest character
Play a lot
Land 20 hits in one game and win
Land the most hits & get the least wins in a game
Play 7 multiplayer games
Play 300 multiplayer rounds
Play 5 multiplayer games
Play 100 multiplayer rounds
Play a level in each Adventure map
Beat all levels in the Island map
3 medal all levels in the Island map
Beat the boss in the Island map
Run a total of 42,195 meters
Play 2 multiplayer games
3 medal all levels in the Forest map
Get killed by a laser
Do 10 Butt Pounds
Fall to your death 20 times
Beat the boss in the Forest map
Beat all levels in the Forest map
Beat 100 enemies
Get 3 medals in 15 Adventure levels
Jump upwards 1609 meters
Get 3 medals in 10 Adventure levels
Land one of each type of attack
Break 30 breakable blocks
Spend more than 3 minutes in the air
Play a Run game
Taunt 20 times
Unlock all gallery content
Beat the Bowhemoth in 60 deaths or 60 minutes
Beat the Bowhemoth in 10 deaths or 20 minutes
Win when an enemy has 1 second or less
Win a tie-breaker
Play with 9 unique costumes/characters
Do 20 taunts in one game and win
Play 1000 multiplayer rounds
Be stunned when you get the trophy
Beat 10 Adventure levels with a friend
Get the Mimicry power-up 10 times
3 medal all of Out of This World