Tag: grouping

Jamey Pittman’s Pac-Man Grouping Tutorial

Jamey Pittman is the creator of the foremost document on the workings of Pac-Man ever created, the Pac-Man Dossier. If you’ve never read it, but have any interest in playing classic Pac-Man, then you should go read it immediately. It will make so many things make sense to you.

Pac-Man has a reputation as a game of patterns, and seems designed in such a way as to enable patterns to work. The only randomness is in the behavior of the ghosts when they’re vulnerable, and even then, if the player has performed the same moves at the same times up to that point in the level, even their vulnerable behavior will be consistent. Its GCC-developed follow-up, Ms. Pac-Man, has the red and pink ghosts move randomly at the start of each board specifically to foil patterns.

But you don’t have to play Pac-Man as a pattern game. It is possible to play it “freestyle,” like a naive player would, reacting to the ghosts’ movements. You’re unlikely to make it to Pac-Man’s famous kill screen at board 256 that way, but you can still make it pretty far.

Key to doing that is keeping the ghosts as close to each other as you can. The ghosts are much more dangerous when they’re scattered around you, because they can block off all of your escape routes. Four ghosts piled up on the same spot not only can’t block off other corridors, but their AIs tend to continue to keep them together, at least when they’re far away from Pac-Man. Red and Orange behave identically when they’re at a distance, and Pink’s behavior appear to be more like Red’s the further away from Pac-Man it us. Blue has the most chance of diverging, but often moves the same way anyway.

Not only does keeping the ghosts clustered make survival easier, but it makes it much easier to eat all of them with a single Energizer. The ghosts only turn blue up to around the 4/6th Key board, but up to that point it’s basically impossible to get the maximum score from every Energizer if one hasn’t managed to herd the ghosts into a single, easy-to-gobble blob.

That’s where Jamey’s tutorial comes through. It presents a series of situations and techniques for getting the ghosts near each other and moving as one unit, whether it’s for avoiding them or getting the maximum points from an Energizer. It’s a bit much for casual play, but it can be very interesting to see how a true expert goes about doing it. Here, then, is the tutorial (27 minutes):

Grouping Ghosts in Ms. Pac-Man

Ms. Pac-Man. Currently on the outs with Pac-Man rights-owner Bandai-Namco because its origins weren’t with them, and its developer GCC licensed the rights to another party than them, which has given us such travesties as “Pac-Mom.” Which is a shame, because in general Ms. Pac-Man is a better game than Pac-Man. Its four mazes don’t have the nuance that Pac-Man’s does (there’s no one-way routes, for instance), it doesn’t have scatter periods to give the player a breather during each board, and after board #7 its fruit, and the score award for chasing it down, is random, taking an important measure of skill and just throwing it up in the air and shrugging.

But it does have multiple mazes. And its Red and Pink ghosts behave randomly for the first bit of each board (here’s a prior post about that), eliminating the major design flaw of Pac-Man: its vulnerability to patterns. Pac-Man is certainly not the only game to lack substantive randomness, but the nature of its maze-based play is that it’s relatively easy to perform them. So long as you hold in the direction you need to go at least five frames before you reach an intersection, you can be sure that you’re performing a pattern perfectly, making Pac-Man into an endurance game more than anything. Ms. Pac-Man doesn’t have that problem.

But that doesn’t mean that Ms. Pac-Man can’t be mastered, and the basis of that is through a technique called grouping. Grouping can be done in Pac-Man too, but if you know some good patterns it isn’t necessary. But in Ms. Pac-Man it’s a key skill, both to make sure you eat as many ghosts as possible in the early and mid boards, and for general survival, for a bunch of ghosts in one lump is much easier to avoid than a scattered mess of four separate ghosts.

David Manning’s introductory video on grouping ghosts in Ms. Pac-Man (20m) is ten years old, but it’s still an invaluable aid for players seeking to master that game.

The basic idea is to understand the ways to move in the maze so that pursuing ghosts take slightly different routes to reach you, so that leading ghosts are delayed just a bit, or trailing ghosts approach you slightly faster.

This time I’m going to leave the explanation to the video, but it’s interesting to think about, and to see if you can apply this information yourself.