How to beat Mortal Kombat AI and the classic bosses

Why the AI feels unfair

The classic Mortal Kombat games are remembered for their difficulty, and the arcade builds in particular have a reputation for punishing runs. The complaint from players has always been the same: the computer seems to know what you are about to do.

That reputation is a community view rather than a developer statement. Digital Eclipse has not published an explanation of how the original AI works. What the studio did publish, in its 2026 updates, was a setting that gives you control over it — which is the practical answer to the problem regardless of how the AI is built.

Fixed AI Difficulty

Digital Eclipse added Fixed AI Difficulty in its updates, and it changes the shape of a run rather than just the surface difficulty.

That last row is the important one for anyone who wants the authentic experience: nothing about the original behaviour is removed, it is simply switchable. The setting is the difference between a run that gets progressively harsher and one that stays where you put it, which is what makes the endings and the completion achievements reachable without a long grind.

Facing the bosses

The bosses are where most runs end. Two achievements in the collection are tied to them directly, and their completion figures show how many players get past them.

Roughly one owner in five has finished the original arcade game, and fewer than one in eight has beaten Shao Kahn in Trilogy. The two numbers together are a fair summary of where the difficulty sits.

Tactics that work

The advice below is general to the classic games rather than a developer-published strategy, and it is offered as such.

• Use the training mode to learn one reliable pattern. The boss AI is not impossible, but it punishes improvisation. A single safe move that you can repeat when the AI is in a particular position is worth more than a varied offence.
• Lower the difficulty before repeating a boss attempt. Fixed AI Difficulty can be set before a run, which turns a run into a controlled attempt rather than a test of endurance. This is the intended route to the completion achievements.
• Expect the round structure to matter. These games are best-of rounds, so a single good round against a boss is worth more than winning the first exchange and losing the second.
• Keep your distance when you are learning a pattern. Learning from a distance costs less than learning inside the AI’s attack range.

Using training mode

Training mode was added in the same run of updates as Fixed AI Difficulty and is set up for exactly the situation this page describes.

• You pick the AI difficulty, so a boss can be practised at a level you can survive.
• Sides can be swapped, which lets you see how the AI approaches the character you are struggling against.
• Position can be reset with the rewind control instead of walking back into place.
• The versus screen can be skipped, which shortens every retry.

Taken together, that is a faster loop than replaying a ladder from the start, and it is the tool the developer added for the problem. The rest of the collection’s achievements are grouped on the roadmap page, and the display-side changes that affect how responsive the games feel are on the input lag page.