You want to get Sapper without grinding the ultra lategame for 50+ hours? In this guide I share the fastest way known to me to get the achievement (8% per hour!). Intro This guide shows a method to farm pops for the Sapper achievement in a way that is easy to set up and easy to automate. Testing on my part showed that the set up takes about 1 hour, after that you should expect about 8-9% of the achievement per hour, resulting in 10-15 hours for all 100%. Further information in the last chapter. First of all a few introductory remarks: The method is only viable on PC (might actually be viable on mobile, I didn't test xP ) Even though it is much faster than every other method I know of, it still needs a substancial time investment (but can be automated quite easily). No MK or Paragons need to be unlocked "Only a few achievements left ...... Would be nice to have them all." That's what I thought a few days ago, so I set out to get the remaining achievements for this game. Of the currently 153 achievements I got many naturally by just playing the game, others can be done in just one game. So with my 950 hours playtime in Bloons, only the most grindy and stupid achievements were left, like Medal Winner (I only play coop), Insta Century (who ever uses insta monkeys?) and the infamous Sapper. As I seldom play ultra late-game or boss events I only had 60% on the achievement and I did't want to wait until I get the achievement naturally after another 600 hours. So I set out to find a way to quickly pop the remaining fortified bloons. And if that is the reason you're here too, you're in the right place. How to pop fortified bloons Popping 5,000,000 bloons doesn't sound that bad at first listen, we often have to pop some 3,000,000 bloons to unlock a new monkey and that is done in a few games. However, here comes the catch: Fortified bloons are really, really rare. In the first 100 rounds of the game there is only a total of 2953 fortified bloons, so you would have to play 1694 times to round 100 to get the achievement. Not that doesn't sound practical at all. Playing to round 140 results in a total of 21,510 fortified bloons, so we would have to play 233 times, which is better, but not enough. If we play in the ABR mode, the numbers get even better. The first 100 rounds contain 5087, the first 140 rounds 30,536. Well, I don't want to sink hundreds of hours into one single achievement and I don't think you do, so we need a faster method. Standard methods If you look up guides for this achievement they mostly suggest one of these two methods: Play the ultra late-game (until round ~ 250-300) Play Elite Bloonarius Now, let's look at these methods. According to @VathoGaming (who has a very in-depth video on how to get the achievement) you get around 4% of the achievement playing to round 300. That's great. We only need to do that 25 times to get all 100%. To reach this round you need ~2 hours if your PC can handle it. This means you have to grind for 50 hours. Finally we're getting closer to a practical solution to our problem. The other method is playing Elite Bloonarius as they spawn a lot of fortified bloons on tier 5. I haven't tested it, but according to some quick calculations beating all 5 tiers by round 139, you should get about 21,000 from normal bloon spawns and 26,000 from bloonarius spawns, which means you would have to beat bloonarius 106 times. Both methods still take wayy to much time for my liking and even worse, they require you to farm, build a strong defense and all in all be very much present for most of the time. Our method I was about to give up and start my first run of Elite Bloonarius, when I read a comment by @crystalzz3832 under @VathoGaming's video. He claims that if you leak bloons in CHIMPS mode and use the "retry last round" button, the fortified bloons you popped in the round still count towards the achievement. This is great news. It means we can, in theory, play the same round over and over again and progress the achievement. @crystalzz3832 did it on round 103, but now my research instict awakens. So let's find out what the best round for this new method is: Round 103 spawns out the equivalent of 1100 fortified bloons in 19 seconds, which equals 57.9 fortified bloons per second (fps). Of all 140 predetermined round the one that has the highest fps is round 107 with an fps of 95. Wow, that's great, than that must be the bast round to do this! Well ... it doesn't suffice to just spawn the bloons, we still need to pop them ... and leak to them, otherwise we would progress to the next round. And the poblem is, that most of the rounds with a high fps spawn out fortified ZOMGs (not so surprising, as each of them contain many smaller fortified bloons) which are super slow and tanky. Furthermore, if we have a great defense, we probably won't leak and if our defense is meager, it takes ages to pop them. Ok then, but which round is the best? Enter ... round 163. This round only has a fps score of 47 (which by the way is still on the higher end of the spectrum), but it is a special round: Mirroring the infamous round 63, to which all of us died countless times, it is comprised of waves of ceramics and leads, most of which are fortified. No slow MOAB-class bloons at all. This makes it easy to pop the bloons fast. Unfortunately, while round 63 is difficult at the time, round 163 is one of the easiest rounds in the game. For how can you leak to a few ceramics if you poped hordes of ZOMGs and BADs the previous rounds? But round 163 has an answer for everything. It is the lead bloons, more specifically the camo lead bloons. If we have no defense against those, we can pop the ceramics, then leak to the leads. Easy! Ok. Our basic idea stands. Now we only need a way to reach round 163 ... in CHIMPS mode and have a defense that at this point doesn't have a way to pop camo lead bloons (anymore) ... Nothing easier than that ;) Here the actual guide starts Now to start grinding the achievement we first have to actually reach round 163 in CHIMPS mode. My method requires almost no micro, so you should be able to replicate it without difficulty, even if you have no experience with the CHIMPS gamemode. RequirementsYou have to have unlocked the following: Tier 5 Monkeys: Super, Engi, Druid, Glue Hero: Adora (please use Voidora skin because it's the best one) Map: CHIMPS mode on Three Mines 'RoundNote I suggest to turn off autostart so you have enough time to follow the steps. You never need to place a tower in the middle of a round and you rarely have to use an ability. If my instructions only specify the round on which to do something, that means before the start of the round (at which point the game still displays the last round). It is not required to follow the placements exactly, I will specify if a tower has to be placed in range of another. Don't be afraid to leak to the bloons as you can always "retry last round" in CHIMPS modeNow let's begin!Select CHIMPS mode on the map Three Mines 'Round with Adora as your hero. Early-Game Round 6Place down a 0-0-0 ninja, this cute little monke will let you breeze through the first few rounds of the game.

第11回合 现在你有足够的钱放置爱多拉

第13回合开始开采第一块金矿

第23回合：开始开采第二个金矿

第25波 这是首次出现紫色气球的波次，而阿多拉对紫色气球存在弱点。 我在这一波没有遇到问题，因为我的忍者猴能够击破所有紫色气球。但如果你难以通过这一波，可以将忍者猴的目标设置为【最强】（波次结束后调回【首个】），或者在紫色气球出现时使用阿多拉的3级技能。 第32波 又一波有紫色气球的波次，这次我在未操作的情况下确实失败了。 同样，将忍者猴的目标设置为【最强】或使用阿多拉的3级技能。 这是最后一波需要使用阿多拉技能的波次，从现在开始你可以随时使用它们。 第33波 现在你需要放置两个【村落】。放置第一个村庄并升级至0-0-2。你可能以为开采地图上的黄金对我来说就足够了，但你看我的贪婪是无止境的。说正经的：这个村庄实际上能帮你省下大量金钱，因为从现在开始，你放置的每只猴子在3级之前都会便宜15%。

将第二个村庄放置在第一个村庄的范围内，并升级至2-2-0。确保升级后爱多拉处于该村庄的范围内（检查她是否获得了丛林战鼓和迷彩增益效果）。

第35回合 将超级猴子放置在两个村庄的作用范围内。 超级猴子非常擅长击破大型气球，有了它们，我们就能应对第40回合的MOAB了。

游戏中期 进入游戏中期后，我们必须巩固防御，同时还要加大投入，派遣猴子下矿开采珍贵的黄金。 第43波 现在开始开采第三处金矿。 这种投入会让你彻底没钱，所以如果在这些波次中有漏怪的风险，可以使用adora的3级技能。

第44回合 当你的防御开始难以抵挡越来越多的气球攻势时，在两个村庄的范围内放置一个胶水猴，并将其升级为2-2-0。 我们要尽快将这个猴子升级到4-2-0，以确保有足够的防御来对抗陶瓷气球。

第46回合：将胶水猴升级为3-2-0。

第49回合，将胶水升级为4-2-0配置。

第53回合：开始开采第四块金矿。

第63回合 尽管我们现在有足够的资金重新开始采矿，但这一次我们必须保持清醒的头脑，将安全置于贪婪之上。 将胶水升级为5-2-0。 【气球溶解器】是游戏中最强大的猴子之一（个人拙见），能让我们轻松度过游戏中期的剩余阶段。

第75回合 我们又来了：仅仅12回合后，我们就通过击破气球收集到了足够的资金，开始开采第五块金矿。

第79波 到目前为止，气球溶解器能够独自对抗任何类型的气球，但随着我们进入游戏后期，气球会变得更大，因此气球溶解器需要一点帮助来击破最坚固的气球层。 为此，请将超级猴子升级为2-0-3。

后期游戏 第85回合 要度过后期游戏阶段，我们还需要更多金钱，所以派猴子去开采最后一处金矿。

第100回合，正好赶上第100回合的BAD，我们有足够的钱终于把超级猴子升级到2-0-4了。

第101波：恭喜你击败了 chimps 模式，现在可以获得新的即时猴子！ 第105波：终于从最后一个金矿获得了资金，现在我们有足够的钱来购买能带领我们打到第163波的主力输出——暗夜传说。将超级猴子升级为2-0-5。凭借蝙蝠猴的全部力量，它们将在接下来的波次中消灭所有气球。你可以根据需要使用暗夜传说的传送技能来传送它们。

第132波 尽管蝙蝠猴自身已经非常强大，但在合适的支援下它们能变得更强。因此，在折扣村的范围内放置一个工程师猴，并将其升级为0-5-0的超级充能。重要提示：将泡沫的瞄准方向（升级头像上的绿色按钮）设置到赛道之外！以免你忘记这一点，导致在第163波出现问题。 现在你应该开始超频暗夜传奇，并在游戏剩余时间里持续进行（抱歉必须使用技能，如果你想存活到第163波，这恐怕是不可避免的）。

第140轮 这是唯一会遇到FBAD的回合，所以你可能需要让暗夜传奇来回传送。 从现在开始，回合是随机的（除了不会出现FBAD），所以你可能需要让暗夜传奇在某些回合来回传送。 此外，你最多可以花费40,000购买更多猴子，但这不是必需的。并且确保你放置的任何防御塔都不能击破铅气球。 准备第163轮 现在你的防御能够撑到第163轮，但你仍需为该回合准备一些东西。如果你愿意，也可以提前进行准备。 首先，确保不要漏气球，因为我们仍然需要暗夜传奇的传送门。第160波。要在第163波击破陶瓷气球，我们需要森林之灵，并且它们的藤蔓生长需要时间。因此，在折扣村庄的范围内放置一个德鲁伊，并将其升级为0-5-0。重要提示：不要给它们升级上分支交叉路径，因为这会赋予它们击破铅气球的能力。

将【夜之传说】传送到图片所示位置，这会让第162回合变得更简单。

第161回合 现在来说说我们选择阿多拉作为英雄的原因（除了她确实很性感之外；）。阿多拉是唯一能进行血液献祭的英雄，你可以指定一只猴子作为祭品献给阿多拉，使她的力量在短时间内飙升。我们并不关心阿多拉的力量等级，我们只对观看猴子被献祭感兴趣。 所以使用这个技能来献祭那个能提供迷彩探测的2-2-0村落。村落消失后，阿多拉将无法再击破迷彩铅气球。

为了让我们的猴子再次从丛林战鼓增益中获益，请将剩余的村庄升级为2-0-2。

在地图左边界放置一个胶水猴，并将其升级为0-4-0胶水打击。我忘记这么做了，所以没有合适的图片，抱歉。这里有一张其他游戏的图片，希望你喜欢。

第162波开始前，再次使用adora的技能来献祭气球溶解器，它们已经很好地为我们效力，现在遗憾的是它们的使命已到尽头。 重要提示：开始这一波前请阅读下一段内容。

在第162回合中，首先你要期望这一回合（和之前所有回合一样完全随机）至少出现一个BAD（幸运的是BAD出现的概率非常高）。尝试击败所有其他气球，只留下一个BAD，然后将暗夜传说传送至地图的右上角。不用担心，这其实比听起来容易得多，因为BAD拥有极高的生命值且移动缓慢。

当敌人离开时，夜之传说会激活他们的传送门并将敌人吸走。恭喜！你已完成设置，准备好开始刷怪了。

The Grind Wow, you've reached round 163 in CHIMPS mode, if that isn't an achievement in its own right. If you did follow the guide meticulously, all you have to do now is start the round. You will see that the Spirit of the Forest is able to pop all the fortified ceramics, but none of the monkeys can pop the camo leads. So you leak to one of the lead waves and now you only have to press "retry last round" to start the round again. IMPORTANT: Never press "home" when in the defeat screen! Always press "retry last round" first, then you can savely exit to the home menu. Unfortunately even if the bloons on round 163 are preset, the order in which they appear is not. So if you have a bad seed, it might be that all of the non-fortified bloons spawn first. If that is the case, you have the Glue Strike to use on the first wave of leads to extend the time until you leak and let more fortified bloons spawn. In my experience you pop around 100-150 fortified bloons per second with this method. Which results in an overall time of around 10-15 hours. I know what you think: I have to press "retry last round" every 10 seconds for the next 15 hours? No way! Isn't there a way to automate this stupid action? How to automate it So you want to automate the grind? Well you know that using any kind of software that automates some actions in the game is cheating and not allowed, right? And I have to say, that neither do I want to entice the use of an autoclicker nor do I endorse any kind of cheating. But ... If you have set your mind to doing such a lothsome action, I just want to make sure that you don't do anything that might hurt you or your computer, as some autoklickers include malware. So I am giving you a quick overview of how an autoclicker would work, if one were to use one. AutoclickerAs I don't trust the many autoclickers that float around in the internet, we're gonna build our own autoclicker with autohotkey (which is open-source). Step 1Download Autohotkey v2 at https://www.autohotkey.com/ or build it from source at https://github.com/AutoHotkey/AutoHotkey/tree/v2.0. Step 2Now we need to know the position of the "retry last round" button to know where the autoclicker should click. On a 1920x1080 screen it should be at (1300, 800). If you have another resolution you can open Autohotkey Dash > Window Spy to see the position of your cursor. Furthermore, you need to know the time it takes from pressing "retry last round" back to the defeat screen. You'll find this value easiest by testing a bit. Step 3Now create a new autohotkey script (it is a normal text file but has the extension .ahk instead of .txt) and copy the following code into it: #Requires AutoHotkey v2.0 ; input time in milliseconds of one loop ; example: it takes 8 seconds from pressing "retry last round" back to the defeat menu ; then next line should be: period := 8000 period := 8000 ; function that executes one loop of clicks and key presses AutoClick(){ ; input the position of the "retry last round"-button ; example: on 1920x1080 screen the position is around (1300, 800) ; then next line should be: Click("1300 800") Click("1300 800") ; input time in milliseconds how long it takes from pressing "retry last round" to being able to start the round ; example: it takes about 0.75 seconds ; then next line should be: Sleep(750) Sleep(750) ; two space inputs for starting the round and changing to fast-forward SendInput("{Space}") Sleep(100) SendInput("{Space}") ; if you want to use a Glue Strike-Ability, ; uncomment the next few lines and input the correct values ;; input time in milliseconds until ability should be used after round starts ; Sleep(4000) ;; input correct hotkey for the ability ;; example: it is ability 7, then hotkey should be 7 ; SendInput("7") } ; press CTRL and w to start/pause the script ^w:: { static toggle := false toggle := !toggle SetTimer(AutoClick , toggle ? period : 0) } ; press ESC-key to terminate the script ESC:: { ExitApp() } Step 4Change the period and click position to the values that apply for your setup and save the script. Now you can start the script by double-clicking the file and start the autoclicking by pressing CTRL and w. If you want to stop the script, press ESC. Step 5Get the achievement while being afk Test results and further information While the bloons that spawn on round 163 are preset, unfortunately the order in which they spawn is random. Spread over 63 seconds a total of 2565 fortified ceramics spawn in sets of varying density. 1000 non-fortified ceramic spawn, as well as 5 sets of 100 leads each, of which one set is comprised of non-camo leads (which Adora can pop). One could expect to pop 2565 / 63 seconds = 40.7 fortified bloons per second (fps). By playing on fast-forward (3x) this number rises to 122.1 fps. Though this is more of an upper bound as we need time for the lead bloons to exit and for us to restart the round. As there are quite a lot of non-fortified bloons in the round (and the density of the fortified sets vary greatly), there is a risk of getting a bad seed, meaning that the denser sets of fortified ceramics spawn after the first lead wave. I did 4 test runs (to find a nice set up), of which one had a seed where all of the 1000 non-fortified ceramics spawn before the first leads, resulting in only 42.8 fps over the round, a third of the pursued goal of 122 fps. I only timed one other run exacly, which had 128 fps, but the others had similar scores. As the variance between runs is quite high, it might prove advantageous to do another run, if one gets a bad seed on the first run. Other stuffI noticed, that sometimes the Spirit of the Forest fails to pop one ceramic (feels like a bug), that can however result in an even better fps, as it eliminates the need to wait for the slower leads to exit. Unfortunately, I don't know how to reproduce the bug consistently. I hope the guide was helpful to you!Thanks for reading!