This is definitely the toughest achievement in the game. As the description says, you need to end a game (i.e. lose by reaching the laser across the top) with all ten of the different cats on screen at the same time.
If you've played at all, you're likely wondering how it's even possible to fit all of those bigger cat heads on screen at the same time. The answer is that it isn't easy, and it's going to take some strategy and planning, because you're going to need to take advantage of all of the available play space, including the overflow from the top before reaching the laser. I'm going to start by showing you the layout I had at the end of my game so you can see the arrangement of heads. Refer to the following clip:
https://www.xbox.com/play/media/qcYWBaGyjxNow I'll go through the strategy to get there, first from a general perspective, and then I'll talk specific gameplay tips. As you can see in the clip and probably surmise, your first goal is to get to the tenth cat, with the mohawk. However, it's also pretty important to make this mohawk cat on one side of the play area (either left or right) rather than dead center. To do this, rather than building up big heads in the center, do it on one side. I talk more about stacking combos in the tips section below, but basically you want to keep making bigger heads on top of your existing big heads, rather than next to them. Once you've got the mohawk cat made (which is probably the hardest part, since getting two ninth cats to touch can often be tough), as long as it's off to one side, you should be in a good position now. You now need to do the same thing on the other side of the play area, except you have less room to work with and you're stopping at the ninth cat. Basically, use the exact same stacking technique mentioned above and detailed below to keep making bigger heads on the other side of the play area from the mohawk cat. This is where you'll likely build up to the top and things will get hairy, especially when you get to the eighth cat, the singer. Really, the only way you're going to get the ninth cat on the other side is to have one big combo that leads to it being made. What you absolutely do not want to do is make another huge cat on top of the mohawk cat. There just isn't enough room up on top of its mohawk and you don't want to accidentally lose because the cat you made shot up in height and touched the laser.
I got pretty lucky with the way my ninth cat fell, giving me room on the left and in the middle to make two more bigger heads. Repeat the same stacking strategy here to make the eighth cat, the singer, in whichever spot has the most vertical space to work with. In my experience, the most annoying and riskiest cat head was the seventh, the one playing the flute. It would often form off to the side or in an inconvenient place, and it was virtually impossible to move it somewhere else. This is another reason why stacking to form the cat you want is so important. If you place heads side by side to make the one you want, there's no telling where that new combo'd head will end up (for example, on the left side of your horizontal string, the right side, or right in the middle). For me, it always seemed to jump to exactly where I didn't want it to be. Once you have the three biggest cats made, the rest should be home free since they're so easy to make by this point. You'll likely be stacking cats on both side of the play area, so make the flute player wherever it ends up first, and stop the other side at the afro cat to make sure you have each. The first five cats are a piece of cake since you can make them all from the drops you're given.
On to some actual gameplay tips. I've included these because, while researching this game, I watched a bunch of gameplay videos, and the people playing would always make baffling bad choices that I couldn't understand. Maybe people just aren't thinking ahead or paying attention? Either way, I'm going to try to explain strategy and give tips. That's tough in words, so I've used a few videos and clips to help illustrate my points as I discuss them.
- Always be paying attention to which cat is coming next, and place accordingly. For example, if you're getting the same cat two times in a row, use that to drop them on top of each other to combine them. This is perfect for stacking. But, if you, for example, get the smallest white cat and another isn't following, consider placing it out of the way of your stack and save it for another white cat later
- Speaking of stacking, that's the optimal way to make bigger and bigger cats. For a while, I was putting cats next to each other, trying to make them touch so they'd combine to form a bigger one. This is not only unreliable, but cats such as the afro cat and the flute playing cat and insanely difficult to push or slide around. Essentially, if they aren't already touching another match when they're made, it's going to be extremely hard to get them to do so.
- Prefacing the stacking technique is the (seemingly obvious) guideline to never put a larger cat on top of a smaller cat. You'd think this would be common sense, but the amount of time people have done it in Youtube videos is absurd. Never ever put a bigger cat on top of a smaller one because once you do, that smaller cat is forever trapped under the bigger one, with no way to combine it. This is basically what screws you over and ruins games, because it'll happen unintentionally sometimes, where one bigger head will fall or roll on top of smaller one(s) and trap them. Sometimes it's not bad, and sometimes it's a game ruiner. You therefore always need to be conscious of this
- Use physics to your advantage. If two cats aren't touching but you want them do, you can either trying to tip one over/knock it over (I found this was rarely successful) or you can try to force one cat over by making bigger heads next to it (which I found to be way more reliable). For example, you have two afro cats just barely not touching. You aren't going to move them easily, but the best way is to start making matches on one side of the pair. As you make that cat head bigger and bigger, its size will keep pushing one afro cat toward the other until it's big enough to force them to touch. But, as I mentioned, you should be trying to avoid horizontal combinations as much as possible because of this exact reason. You don't need to worry about moving cats when they're stacked
Let's look at some stacking clips.
https://www.xbox.com/play/media/i9PMzAQHBVIn this first clip, you can see how I'm arranging my cats: putting smaller ones on top of bigger ones, and ideally putting the preceding one on top of the next one (for example, smallest white one on top of the yellow one). In this clip, you can also see how a rolling bigger head can screw you by moving on top of smaller ones and trapping them. Thankfully, when I combo'd into the flute player, it just barely opened up the smaller ones, but realistically there's no way to make a bigger cat with those small ones that are now basically trapped.
https://www.xbox.com/play/media/iCMcZkpe88This clip takes place just after that one, but you can really see a stacked combo in action. The fifth cat with the white head on bottom, then the fourth gray cat, then the third cat with the blue hat, then the second yellow cat on top, and match that yellow cat and the whole thing combos straight down to the bottom. This is exactly how you want to be arranging your combos, because as you can also see in this clip, I have an afro cat stuck on the right side. There's no way to move it anywhere else, and there's no room to make another afro cat near it. Stacks on top would have to be flawless, and even then it'd just make a flute player that would be stuck there.
I know it's a lot to read, but you'll get the hang of it after a bunch of games and trying things out. Use bombs strategically to clear away big heads that are covering up smaller ones so they aren't forever trapped, stack your heads up to combo down to the next biggest head, and make ideal use of the play area (i.e. don't build up to a big head somewhere inaccessible, like on top of a stack in a corner where you'll never be able to reach it). Even with all the skill, some RNG will come into play, such as being given good cats in a good order, or the physics not screwing you over somehow, like with a bad roll or a bad combo. Keep at it, and you'll get a run where you get all ten cats. Once you have them, don't get greedy. Strategically stack them to end your run as soon as you have the last four cats on screen so you don't accidentally make a combo that eliminates one of them!