Full list of all 50 Mortal Kombat achievements worth 1,000 gamerscore. It takes around 300-500 hours to unlock all of the achievements on Xbox 360.
Earn 2500 Respect Points via king of the hill matches
Win both rounds with timer running out in an Online Ranked Match
Win 10 Ranked Online Matches in a row
Comeback with under 10% health in an Online Ranked Match
Gain Mastery of 1 Fighter
Discover and fight Hidden Kombatant 3 in Arcade Ladder
Discover and fight Hidden Kombatant 2 in Arcade Ladder
Discover and fight Hidden Kombatant 1 in Arcade Ladder
Get all MK Dragons in Test Your Luck
Perform every fighter's hidden finishing move
Perform 8 throws in an Online Ranked Match
Complete Arcade Ladder on max difficulty without using a continue
Unlock Mileena's 3rd Alternate Costume
Complete all Tower missions
Complete all Test Your Might mini-game challenges
Complete all Test Your Sight mini-game challenges
Complete all Test Your Strike mini-game challenges
Unlock 100% of the Krypt
Perform a Fatality with all playable fighters
Complete Arcade Ladder with All Fighters
Discover and fight Hidden Kombatant 4 in Arcade Ladder
Successfully land every playable fighter's X-Ray attack
Perform every fighter's forward and backwards throws
Unlock all Alternate Costumes
Win Arcade Tag Ladder with robot Sektor and Cyrax
Perform 1 of each type of "-ality"
Perform any fighter's hidden finishing move
Unlock 50% of the Krypt
Complete Arcade Ladder without blocking (allowed to continue)
Earn 1000 Respect Points via king of the hill matches
Win 10 king of the hill matches in a row
Unlock Hidden Fighter "Quan Chi"
Complete Story Mode 100%
Win A Ranked Online Match without jumping
Unlock Hidden Fighter "Cyber Sub-Zero"
Complete 25 Tower missions
Complete Story Mode 50%
Complete 200 Versus matches (online OR offline)
Win 100 total Online Matches
Get a Flawless Victory in an Online Match
Complete 100 Online Matches
Perform and land a Tag Combo
Spill 10000 pints of blood
Complete Tutorial Mode
Perform a 10-hit combo with any fighter
Complete Fatality Trainer
Complete Arcade Ladder with Any Fighter
Perform a Fatality!
Win an Online Match
Gain Mastery of All Fighters