Here is the full list of all 46 Runbow achievements worth 1,000 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox One.
Play a Lot
Beat all of Lost Luau
Beat Adventure mode and defeat Satura
Beat Satura in Monster Manor
3 medal all of Forgotten Forest
Beat Satura in Break-Out
Unlock every guest character
Get the Swapper power-up 10 times
Play King Of The Hill
Beat all of Forgotten Forest
Play a level in each Adventure map
Be stunned when you get the trophy
Beat Satura in Lost Luau
Play a Run game
Do 20 taunts in one game and win
Get the Mimicry power-up 10 times
Beat 10 Adventures with a friend
Win a tie-breaker
Land 5 super punches
Land 20 hits in one game and win
Get hit by lighting 10 times
Play Arena
Get 3 medals in 15 Adventure levels
Break 30 breakable blocks
Get 3 medals in 10 Adventure levels
Set the fun type to Kawaii
Set the fun type to Maximum
Beat 100 enemies
Beat Satura in Forgotten Forest
Fall to your death 20 times
Get killed by a laser
Land one of each attack
Spend more than 3 minutes in the air
Do 10 Butt Pounds
Taunt 20 times
3 medal all of Lost Luau
Beat all of Break-Out
3 medal all of Break-Out
Beat all of Monster Manor
3 medal all of Monster Manor
Beat all levels in Adventure mode
3 medal all levels in Adventure mode
Unlock all Gallery content
Beat the Bowhemoth
Beat the Bowhemoth in 60 deaths or 60 min
Beat the Bowhemoth in 10 deaths or 20 min