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