Cave Story+ Booster guide: v0.8, v2.0, air supply and dangerous terrain
Understand how movement equipment changes Cave Story+ exploration.
Edition covered
Cave Story+ builds on the 2004 freeware Cave Story. These pictures are the 2011 PC Steam edition; Switch-specific additions and Cave Story 3D are not assumed by the route instructions.
Choose the Booster path with the ending in mind
Booster v0.8 is offered at the Labyrinth pit. Passing that event supports the later v2.0 route and Curly rescue prerequisites, so decide before taking the early upgrade.
| Movement tool | Behavior | Planning note |
|---|---|---|
| Jump | Basic vertical movement | Use a clear landing |
| Booster v0.8 | Earlier upward boost | Taking it affects the best-ending chain |
| Booster v2.0 | Directional boost bursts | Practise direction changes and landing |
| Level-three Machine Gun | Downward firing can support upward movement | Requires maintaining the weapon level |
| Curly’s air supply | Supports underwater survival after the story event | Does not erase other water hazards |
Practise v2.0 bursts on safe ground
Booster v2.0 gives directional bursts rather than unlimited free flight. Learn how a burst ends and how landing restores the next movement opportunity before crossing spikes.
| Obstacle | Useful preparation | Mistake to avoid |
|---|---|---|
| Wide spike gap | Read the full boost route | Changing direction too late |
| High return ledge | Check the current movement tool | Assuming an early drop is reversible |
| Underwater tunnel | Watch remaining air | Stopping to fight without an exit |
| Weapon-based ascent | Keep the Machine Gun powered | Taking damage and losing the needed level |
| Final Cave | Bring reliable movement and health | Rushing through hazards after an upgrade |
Watch the air meter underwater
Before the relevant air-supply story event, Quote has limited underwater air. Find a surface or exit rather than treating every submerged side route as safe.
Inspect return routes before dropping
Many areas contain ledges that are easy to descend and difficult to climb. Later movement tools reopen routes, but a dangerous landing remains dangerous even when a return trip is possible.
A stronger Booster opens routes, but it is not a shield against spikes or contact damage.
References
| Reference | Website |
|---|---|
| Cave Story+ publisher listing | store.steampowered.com |
| Cave Story ending prerequisites | cavestory.fandom.com |
| Curly rescue procedure discussion | gaming.stackexchange.com |