Here is the full list of all 57 Super Rude Bear Resurrection achievements.
Beat the Boss Rush Marathon without dying.
Collect every other achievement.
Beat the Full Run marathon in under 2 hours 10 minutes.
Complete every level in the game on at least Iron.
Complete every level in the game on at least V.
Complete every level in the game in 10 or less deaths.
Complete every level in Hateworld without dying, including bonus levels.
Beat Hateworld in under 10 minutes on Iron mode in one go.
Defeat The Wizard
Collect every Fairy statue.
Beat the third deathclock on 7-4, only touching the marked platform
Complete every level in Fleshworld without dying, including bonus levels.
Beat Fleshworld in under 5 minutes 30 on V Mode in one go.
Defeat Dark Rude Bear
Beat 6-5 on Iron without pushing against Dark Rude Bear.
Hop over the sand platforms in 6-5 without touching the bottom row.
Ascend the vertical shafts in 6-4 without activating each spitter more than once.
Beat 6-3 in less than 30 jump button presses.
Get to the 4th coffin in under 28 seconds on 6-2.
Complete one section 5 times on Practice Mode.
Find something out of place.
Found Rudey's dark secret.
Spend 10 minutes under the fleshwater in 6-1.
Complete every level in Spacestation World without dying, including bonus levels.
Complete Spacestation in less than 10 deaths in one go.
Defeat Wasteman.
Beat 5-4 with less than 30 jump button presses.
Beat 5-3 with less than 50 jump button presses.
Survive for 30 seconds in the cog room of 4-3 on at least V mode.
Complete every level in Factory World without dying, including bonus levels.
Complete Factory in one go with less than 300 jump button presses.
Defeat B-Boy
Pass the third frost laser on 4-4 without stepping off frosty ground.
Go backwards in 4-3 from the final coffin to the previous coffin.
Get past the final shaft in 4-2 without wallsliding.
Beat Temple in under 8 minutes in one go, collecting all the fairy statues.
Complete every level in Temple World without dying, including bonus levels.
Defeat Riddim.
Beat the Red Snake corridor in 3-4 with 0 corpses.
Destroy all sand blocks in one life on 3-4.
Jump on every block in the final corridor and beat the boulder to the exit of 3-2.
Complete every level in Iceworld without dying, including bonus levels.
Complete Iceworld in one go without dying or fighting Flow.
Beat 2-2 without touching any icicles.
Get through the spiky tunnel at the start of 2-5 by riding a corpse.
Defeat Flow.
You should pay attention to The Fairy.
Finish the last corridor in 2-1 by jumping under the icicles.
Get to the second coffin in 1-B3 in under 8 seconds.
Reach the second coffin in 1-5 in under 8 seconds.
Skip the descending lift in 1-4.
Complete Castle World in one go with only one hand.
Complete every level in Castle World without dying, including bonus levels.
Defeat Germ 'n Whip.
Finish 1-2 without touching the travelling block for more than half a second.
Beat the tutorial in under 26 seconds.
Complete the Tutorial. Good luck!