Axis of Havoc

"Have one of each T5 sniper in one game of CHIMPS"

- BTD6

 is an achievement in BTD6, introduced on Version 14.0. It can be achieved by having one of each Tier 5 Sniper Monkey (Cripple MOAB, Elite Sniper, Elite Defender) on the map in a game of CHIMPS. Earning this achievement will reward two Glue Traps and two Camo Traps.

Tips

 * It does not matter if the player wins the game of CHIMPS with all three Tier 5 Snipers, nor does it matter if the trio are all obtained beyond Round 100.
 * The player can buy the final Sniper, go Home, and reload the round to undo the buy but still earn the achievement.
 * It costs $106,920 to get all three Tier 5 Snipers assuming that the Snipers have no crosspaths. This leaves $71,989 left to buy any other defense to help with defending the rest of the CHIMPS game if one is aiming to finish it within a single game.
 * Using defenses that are cheap but can carry to higher rounds are required to get the achievement due to the later rounds being problematic for Snipers. Pat Fusty with The Tack Zone is an example of a cheap combo that can beat most of the rounds and gain enough money to get all Tier 5 Snipers.
 * Try completing Axis of Havoc on a Beginner Map such as Logs or Cubism, where the map in general is easier and the Snipers can deal more damage due to the longer track length.

Strategy
Start out a normal CHIMPS game on an easier map. The recommended map provided by this strategy is Cubism, a relatively long map with no Line of Sight issues, allowing all Snipers to be able to be placed far more freely around the map. Start with the usual CHIMPS setup, although with Cubism it is safe to start with a Sniper plus a Dart Monkey on an appropriate spot. Purchase the hero as soon as possible, the best option for this challenge being Pat Fusty. If using Pat Fusty, make sure he is buffing the most powerful nearby towers, preferably a Tack Sprayer that would eventually be upgraded to The Tack Zone.

Ensure appropriate camo detection is afforded by Round 24 (recommendation: Ninja Monkey), Lead popping by Round 28 (recommendation: Alchemist), Ceramic popping power by Round 38 (recommendation: 2-0-2 Large Calibre or 3-0-2 Deadly Precision set on Strong), and MOAB-class popping power by Round 40 (recommendation: MOAB Mauler, 4-0-2 Maim MOAB, or a 2-0-4 Overdrive nearby Pat Fusty with Rallying Roar ability active). Prepare defenses for those rounds while at the same time trying to set up the ultimate Sniper defense. Try affording Elite Defender first, preferably the 0-2-5 Elite Defender, as it will be the most viable Sniper upgrade for defending mid-game. With the 0-2-5 crosspath, pair with Stronger Stimulant and Jungle Drums for significantly better results. Try affording Elite Defender by around Rounds 50-55, but no later than Round 60 for the best results.

Beware of the difficult rounds in the mid-game. Again, try substituting usual defense for Snipers as much as possible. For Round 63, a 3-0-2 Deadly Precision will be handy for chipping away at incoming Ceramics if set on Strong, although an Elite Sniper + Alch buff is sufficient because of the Version 23.0 buffs to Supply Drop shrapnel. For Round 64, although not usually hard on most rounds it is difficult with Sniper-only defenses, so try using other non-Sniper defenses to help beat Round 64, such as 2-0-4 Overdrive with Stronger Stimulant, especially if near Pat Fusty. Round 75 is another difficult round for Snipers, although adding a 4-0-2 Maim MOAB on Strong should help ease the defenses a fair bit by stalling the densely packed BFBs.

After affording Elite Defender, try going for Elite Sniper, an upgrade that will help boost attack speed of all Snipers by 33%. Although its crates will do no help on CHIMPS Mode, even just a 33% attack speed boost will help improve the Elite Defender's performance by a great amount. The 2-5-0 Elite Sniper will usually be the far superior option, and it will do a decent job at wiping out regular bloons alongside Elite Defender.

Rounds 81+ are a real challenge for Snipers, as they tend to struggle a lot against Super Ceramics. Do not rely on Snipers to stop Super Ceramics; use the alternate non-Sniper defenses to stop them. Try using an effective anti-Ceramic tower to stop Super Ceramics, and avoid popping the MOAB-class bloons all at once. Good general purpose towers to facilitate this solution are generally Tier 5's that expertise against Super Ceramics such as a 5-0-2 The Bloon Solver, 5-2-0 The Biggest One, or 0-2-5 Permaspike. It is still okay to use towers that may be able to obliterate all bloons at once, such as Pat Fusty + 2-0-5 The Tack Zone or 3-0-2 Sun Avatar (with Knockback and Ultravision), but it's either all popped at once or nothing; anything in between and it's too hard for the Snipers to handle. 0-1-3 or 0-2-3 MOAB Glue and 0-3-2 Glue Hose are also effective options for slowing down MOAB-class or Super Ceramics, respectively. The final challenge will be to try saving up ~$36,700 for the Cripple MOAB upgrade, preferably the 5-2-0 crosspath. Before then, ensure Rounds 81-100 are handled with easily.

As long as there's all Tier 5 Snipers (Cripple MOAB, Elite Sniper, and Elite Defender) on the screen on CHIMPS Mode, the Axis of Havoc achievement will be earned.

Trivia

 * The name for this achievement is a reference to the Ninja Kiwi game Countersnipe, where one of the factions is named "Havoc".
 * The name for the achievement is may be a reference to the term "axis of evil" coined by George W. Bush. Subsequently, many other nations around the world began coining their own nation trios to categorize countries with a single theme in common, such as "axis of terror", "axis of resistance", "axis of good", and "axis of diesel".
 * The name also may refer to the term "axis", meaning an agreement or alliance between two or more countries that forms a centre for an eventual larger grouping of nations. An example were the Axis powers in the historical event World War II.
 * Since this achievement first came out, players have been attempting their own Axis of a certain tower. For instance, "Axis of Mortar" for beating CHIMPS with The Biggest One, Pop and Awe and Blooncineration all in the same game.
 * The most expensive set of the series where all Tier 5 upgrades from the same tower type are purchasable is currently Boomerang Monkey, with an approximate accumulative cost of $161,250 with Glaive Lord, Perma Charge, and MOAB Domination.
 * All possible Axis of X combos (not including Banana Farm or Monkey Village due to disabling of Farms) excepting Monkey Ace, Heli Pilot, Dartling Gunner, Alchemist, Druid, Super Monkey, Spike Factory, and Engineer Monkey have been done by other players on all Beginner Maps. Out of the ones that have not been done on all Beginner Maps, two of the not yet done Axis of X combos are theoretically affordable in a game of CHIMPS but being too expensive and being too weak, which applies for both Heli Pilot and Alchemist. The rest are simply impossible due to certain Tier 5 upgrades being impossibly expensive.
 * Some players have excluded Flying Fortress, Superstorm, Super Mines, and Ultraboost for completing practical versions of the Axis of Aces, Axis of Druids, Axis of Spikes, and Axis of Engineers respectively. Others have done a practical Axis of Supers by using Sun Avatar (Tier 3), Tech Terror (Tier 4), and Dark Champion (Tier 4). Some players have also done Axis of Villages by ignoring Monkeyopolis.
 * Because the Axis of Havoc achievement was released between the release of Engineer and Dartling, Dartling was not yet considered in the Axis of X combos list until Dartling was released in Version 22.0. Since then, Axis of Dartlings is normally done with one Tier 5 with the rest as Tier 4, that Tier 5 being either M.A.D. or Bloon Exclusion Zone, due to their respective Tier 5 collective prices being only moderately expensive.