Easy wins
Note: This trick can only be done with Sub-Zero, Kung Lao, Li Mei, Cyrax, Shang Tsung, Frost, Reptile, or Kitana. You can impale your weapon into your opponent, making them lose life every second. The move varies, and with some you have to press the D-pad and the button. To find the correct move, press Start, select "Move List", then look under your weapon and it will say "Impale". All of them have to be close range, but Kitana can throw her steel fans. However if it hits and they block or dodge it, you cannot use it again until the end of the match.
Use the following trick to get easy wins in arcade mode under the maximum difficulty setting. Choose Quan Chi or Nitara, then repeatedly use their throw attack on the opponent. Then quickly stand over them and continuously tap Throw. Try to time it so that you throw them just as they are getting up. When doing this, you should be able to defeat any opponent (except Moloch) with little to no effort. Note: You will not always grab them with the throw before they begin attacking; you may have to keep blocking until they finish their combo or move, thus leaving them open for a string of throws. Using Nitara is much easier and usually results in a flawless victory.
Play as someone who has a weapon that you can impale into the enemy (for example, Li Mei's daggers or sai). At the start of the fight, pull out your sai and stab the enemy. Then, quickly use your special move for your two other fighting styles and keep repeating.