Mortal Kombat

Requirements to become Mastery of a Fighter include:

100 Wins / Victories
150 X-Ray
100 ~alities (Any form of finishing move)
10,000 Pints of Blood Spilled
24 hours play time with that char

For this achievement, you only need 1 Character to get all these stats.

You can check the progress in the Nekropolis in the Krypt (Which unlocks after purchasing 10-15 tombs). After unlocking it, you can access it right from the menu without going to the Krypt. Once in the Nekropolis, select your character and choose the View Stats option to see your progress.

Some shortcuts to speed up the progress include:

24 hour playtime: Plug in a Wired controller, go into Team Battle Training, and select 2 chars you want to gain time with. Go to sleep / work / outside, come back and the timer will keep on running. Cheap, but effective.

All the stats carry over from Online / Offline modes (so 20 wins online with Scorpion + 80 Arcade wins will unlock that portion of the achievement). The only mode that doesnt count towards these achievements is the Tutorials (including Fatality Tutorial) and the Tower Challenge (Wins don't count, everything else counts though).

An easy and fast way for mastering 1 fighter and it should also work for mastering all fighters aswell.

For the 24h play time:

You can boost it with 2 different fighters at the time by choosing the Tag Team Practice mode. Select 2 different fighters that you want to boost and leave the game there for 24h. Go to sleep/work/school. After 24h, both fighters will have the 24 hours play time (You can check the progress in the Nekropolis). This means, that you can boost the 24h play time for all the playable fighters in ~13 days instead of 27 if you boost it 1 fighter at the time.

For the 100 victories and 150 X-Ray attacks (these two are counted for both fighters)

Make sure the round is set to 3 and time is set to off (no timer) in the Options.

This one involves using only 1 Kombat Kode (aka "cheating"), so if you are not into cheating, don't use Kombat Kodes but the trick remains the same, except it will take a little bit longer. Using a Kombat Kode will not void the achievement.

Choose 2 Players, then select Versus mode and choose Two vs Two mode (you will need 2 controllers). Choose 2 fighters, 2 that you want to boost, the others don't matter. Press Y and choose any arena where you can do a Stage fatality. Then start the fight.

At the loading screen, quickly enter the 466-466 code with both controllers using the X, Y and B buttons. This will enable the Unlimited Super Meter mode. With this mode, you can do unlimited X-Ray attacks until you win the round (you kill the other fighter).

To boost these 2 elements in one match, do the following steps.

For the first 2 rounds, use both boosting fighters X-Ray attacks until you win both rounds. I suggest switching fighters (press LB) when one of the non boosting fighter is out and use the other boosting fighter's X-Ray attack on the 2nd fighter. This way, you can perfom the same amount of X-Ray attack with both fighters. The match is not over yet because you have to win a 3rd round.

During the 3rd round, do the X-Ray attacks with your boosting fighters but don't kill one of the 2 fighters, leave a small amount of health. Use the 2nd controller to beat P1 (your boosting fighters). Repeat this above step 1 more time. Now the match should be tied (2 wins for each fighters).

At round 5 (final round), use the boosting fighters X-Ray attack again. At the Finish Him/Her! screen, perform one of the fighter's "-ality" and win the match.

Again, I suggest that you switch the boosting fighter (press LB) when one of the non boosting fighter is out for all 5 rounds. I managed to perform 13 X-Ray attacks with Kano and 15 with Raiden.

This method will also boost the 200 Versus matches.

Along the way, you will unlock the Finish Him?, Complet-ality, Ultimate Humiliation, The Grappler, Finish What You Start! and e-X-cellent achievements if you change characters between matches and if you do the 2 throws also.

For the 100 "-alities"

Set the round to 1 and timer to 30 secs. Choose 2 players, Versus, One vs One. Choose 1 boosting fighter, 1 random. Select an arena (with Y) where you can perfom a stage fatality. Start the match. At the loading screen, input the Sans Power code (044-440). 1 hit and the Finish Him/Her! screen should appaer. Perform the fighter's stage fatality. Rinse and repeat 99 times. Don't forget to input the code during each rematch.

For the 10,000 pints blood spilled.

Set the round to 3 and timer off (no timer). Choose 2 players - Versus - 2 vs 2. Choose 2 boosting fighters and 2 random. Do not enter any code at the loading screen. The trick/steps are the same as for boosting the 100 wins/150 X-ray attacks. The only thing you do is uppercuts now. You should spill ~1000 pints of blood per match.

This achievement is pretty easy to get as most people have a favorite player to use, it just takes a little time for the day play time but if you want to just gt the achievement quick I suggest playing 1v1 ( or 2v2 to boost the second character while your at it as it does boost both players time even when that player is sitting out waiting to be tagged.) over night or when you are not going to be playing. aka eating / watching TV / out to work. etc..

As for the victories / fatalitys / xrays there are a few codes you can set for 1v1 vs mode such as 044/440 for instant win to get fatalitys up quick.

For your xrays the code used for unlimited super meter is 466-466 for this set the game to 3 rounds and 2v2 tag so you can get the most out of your round. in just 13.5 days you should have all characters mastering the 24 hour mark

** I know most of this was said in other guides but this is my first and thought id try to help out aswell **

All good solutions, i used varying forms of them but i suggest doing story mode and then arcade ladder with the fighter first so those will count in and save a bit of time. Those can knock out 13-15 wins, 8 fatalities, buckets of blood, a bunch of xrays and a little time before you even start this tedious boost. Challenge tower also helps, especially if you get stuck on one, except for wins. Basically do as much as you can before this.

All of the above are sure to work. I only want to add that apparently if the 24 hours is the LAST thing you get toward your mastery, the achievement does not simply pop when you hit the mark. I was using Sektor and had everything done except the time. I let the xbox run overnight on training and by mid-morning I had mastery of all 5 areas, and no achievement. A little panic happened here. Then I simply went into arcade ladder and performed a fatality and voila, achievement. So as I said, if you're done with everything but time (which I don't see how you wouldn't- a day is a long time), you can't just wait for the time to pop the cheevo, You have to go in and do one more -ality (or maybe just an x-ray or regular win) to get it to pop.

If you want to get this achievement done quickly (And you were planning on doing the challenge tower) i'd suggest using Kano because he has the quickest way to grind X-Rays in the game.

For this achievement you'll need the following:
100 Wins
100 -ality's
150 X-Rays
Spilled 10,000 pints of blood
Play time of 24 Hours.

Kano's fatalities can be a bit tricky to perform, so you'd best stick to his stage fatality (Up, Up, Back, A at close range. Hold RT to stay still while entering the inputs) You'll want to load a 1 round 30 sec match on any of these maps: Hell, Subway, The Dead Pool, The Living Forest, The Pit (Day + Night) and The Street. At the loading screen input the code 044 - 440. This enables 1 hit kills, so after one hit you can perform your stage fatality. Rinse and repeat, remembering to enter the code each rematch.

You'll also get your 100 wins this way.

Now for the X-Rays. The tricky bit is getting to challenge 229 - in the Challenge Tower. If you were going to complete the Challenge Tower anyway, this shouldn't be a hassle. Now, Challenge 229 is special in that it gives you 5 enemies to fight, unlimited Super Meter, 2x Damage and Invulnerability. This means that you can land 2 X rays on each character you face before they die. When you've killed Sonya it'll tell you to Finish Her! At this point you must press Start and select return to Tower, because if you finish Sonya you won't be able to replay the challenge. Now simply rinse and repeat, you can get 10 X Rays per round in under 2 minutes, meaning you'll only have to do this 15 times.

You should already have spilled 10,000 pints of blood by this point, if not, play a tag team game and uppercut a bunch of times to spill blood.

Now the last thing you need to do is play 24 hours with Kano. To do this, make sure you have a wired controller or a plug and play kit, also make sure your xbox has Auto Shutdown disabled. Now enter practice (Tag team practice if you want to get My Kung Fu Is Stronger) and leave it overnight or while you're at work etc.

Congratulations! You've mastered Kano, now onto the other characters...