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