Lost Crevasse
| Difficulty | Intermediate | ||
|---|---|---|---|
| Music | Winter Nights Chilled | ||
| Default Co-op division | Free-for-all | ||
| Introduced | Version 50.0 | ||
| Entrances | 2 | Exits | 2 |
| Junctions | 2 | Water? | Yes |
| Path lengths (RBS) | ||||
|---|---|---|---|---|
| Path | Easy | Medium | Hard | |
| Center | 25.9 | 23.5 | 20.7 | |
| Left | 18.8 | 17.0 | 15.0 | |
| Right | 17.0 | 15.5 | 13.6 | |
Lost Crevasse is an Intermediate map in Bloons TD 6, introduced in version 50.0. It takes place inside an icy cavern where Bloons split into multiple groups as they progress, but they move slower than usual, and is surrounded by walls where bouncing projectiles can excel, but ice crystals prevent towers from being placed on some places.
Layout
Lost Crevasse's layout consists on a large land mass in the upper section surrounded by the Bloon's path and and a lower section divided in two parts separated by a column of crystals which block line of sight. The left side has more land area and the right side contains a lake where water towers can be placed. It has three paths that Bloons can take:
- Path 1 (Center) starts on the left entrance moving clockwise around the land until the right junction, here the Bloons keep moving around the top section until the left junction where they head towards the the left exit. Boss Bloons always take this path.
- Path 2 (Left) starts from the right entrance moving anti-clockwise around the upper section until the left junction, where they keep moving towards the left exit.
- Path 3 (Right) starts from the left entrance and continues clockwise, in the same way as Path 1, but when the Bloons reach the right junction, they will continue towards the right exit.
All three paths are active at the same time and new spawned Bloons will alternate between them.
Strategy
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Lost Crevasse is one of the more difficult Intermediate maps, due to the simultaneous lanes that switch patterns every round, even with this map's artificially slower Bloon speed.
Update history
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Fixed spots where towers could be placed in locations they are not supposed to (bug fix)
Removed duplicate Pre-game Prep spikes on all lanes (undocumented) (bug fix)
Bloon speed reduced
Center path RBS increased (Hard RBS) ― 20.7 → 25.2
Left path RBS increased (Hard RBS) ― 15.0 → 17.4
Right path RBS increased (Hard RBS) ― 13.6 → 16.6
Gallery
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Island statue
Development

This map was first revealed in the BTD6 Dev Diary #2[1], where Ninja Kiwi stated that the map took inspiration from Silas, who was released in the same update. They also presented an early image of the map with slightly different layout compared to the final release. The main differences are the lack of the final bends towards the bottom of the map, the presence of ice crystals on the left and right sides and a slightly different placement for the water area, alongside simpler visuals in general, specially for the ice crystals in the middle.
The post implies that Silas was meant to have an ability that mitigates the ice crystals interfering with tower placement, but his only mechanic on release that affects tower placement is his ability to freeze water.
Trivia
- In the update preview video for version 50, this map was incorrectly named "Frozen Crevasse".
In other languages
| Language | Text | Notes |
|---|---|---|
| Arabic | الصدع المفقود | — |
| Danish | Fortabt gletsjerspalte | — |
| German | Verlorene Gletscherspalte | — |
| Spanish | Grieta Perdida | — |
| Spanish (Latin America) | Grieta perdida | — |
| Finnish | Kadonnut railo | — |
| French | Crevasse perdue | — |
| Italian | Crepaccio perduto | — |
| Japanese | 忘却のクレバス | — |
| Korean | 방황의 빙하동굴 | — |
| Dutch | Verloren kloof | — |
| Norwegian | Fortapt bresprekk | — |
| Polish | Zaginiona Szczelina | — |
| Portuguese (Brazil) | Fenda Perdida | — |
| Russian | Затерянный провал | — |
| Swedish | Förlorad Glaciärspricka | — |
| Thai | รอยแยกที่หายไป | — |
| Turkish | Kayıp Yarık | — |
| Chinese (simplified) | 失落冰隙 | — |
| Chinese (traditional) | 迷失裂谷 | — |
References
- ↑ 1.0 1.1 Corey (Sun, 6 Jul 2025). "BTD6 Dev Diary #2". Ninja Kiwi on Reddit. Retrieved Sun, 6 Jul 2025.
- Path lengths sourced from the BTD6 Index