NAPSFRILLS

For the official BTD6 counterpart, see CHIMPS.

Official Name
The term "NAPSFRILLS" is a term popularized by fans and is confirmed by official sources (e.g. in-game, Ninja Kiwi blog).

NAPSFRILLS is an acronym standing for No Agents, Premiums, Specialties, Fa rm i ng, Road Items, Lives Lost, and Selling. NAPSFRILLS strategies do not affect gameplay whatsoever, but many consider it an achievement to manage NAPSFRILLS, particularly on Hard mode and/or on a difficult Daily Challenge. Furthermore, following these restrictions when making a guide may make the guide easier to follow by removing paid content, minimising microing, and maximising room for error.

Every Bloons Tower Defense 5 track except Tar Pits and Down The Drain can be completed NAPSFRILLS on Hard. On mobile and Steam, most Expert maps can also be completed in this manner on Impoppable.

Some players think the I stands for Injections, but others consider injections to be premiums and thus covered under the P.

NAPSFRILLS is officially a concept in-game in Bloons TD 6 since Version 48.0, as part of a returning map adapted from Bloons TD 5, Tar Pits, unlocked only by pressing several scratched rocks on Spa Pits in a specific order.

Variants

Other variants do exist, the most popular ones being NAPS and NLL. Sometimes, when certain elements are used, the corresponding letters are dropped. When lives are lost, NAPSFRIS is commonly used. If a farm or any other form of cash generation is used, the player may say NAPSRILLS.

Occasionally, instead of dropping the letters, the used elements are covered by asterisks. NAPS***LL* means the player has used Road Items, was farming and selling.

There are many variants to NAPSFRILLS including:

NAPSDRILLSFAST - No Agents, Premiums, Specialties, Dartling guns, Road Items, Lives Lost, Selling, Farming, Abilities, Saving, or Targetting
NAPFRILLS - No Agents, Premiums, Farming, Road Items, Lives Lost or Selling
NAPRILLS - No Agents, Premiums, Road Items, Lives Lost or Selling
NAPS - No Agents, Premiums, or Specialties
NAP - No Agents or Premiums
NLL - No Lives Lost
NAPS NLL - No Agents, Premiums, Specialties, or Lives Lost
NLLS - No Lives Lost or Selling
NALPSFRILLS - No Agents, Lab, Premiums, Specialties, Farming, Road Items, Lives Lost, or Selling (for BTD5 Mobile)
NALPSDRILLSFAST - No Agents, Lab, Premiums, Specialties, Dartling guns, Road İtems, Lives Lost, Selling, Farming, Abilities, Saving, or Targetting
NALPSQ - No Agents, Lab, Premiums, Specialties, or Quests (since they give free monkeys)

Trivia

C.H.I.M.P.S. Mode in Bloons TD 6 is likely inspired by NAPSFRILLS.
By default, on Impoppable difficulty, the NLL or other variants with the LL included must be achieved to win these Impoppable medals.
NAPSFRILLS is referenced in the description for the Hidden Achievement Nah, I'd win in BTD6, which is obtained by beating Spa Pits's secret form with NAPSFRILLS ruleset.

External links

A series of the NALPS strategy - showing gameplays where tracks are played in Impoppable without offensive agents, Lab, Premiums, Specialties or the Bloon Scrambler. In these videos, the Monkey Farmer agent is used to push bloons away from the exit if the bananas on the track lasts long enough. In a few extreme cases only and Down the Drain, turtles were used.