Ren'Py [Koikatsu] Vacation to Earth [Prototype v0.5] [MondongoLonrongo]

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Developer Name
MondongoLonrongo
Developer Links
Version
Prototype v0.5
Latest Update
Sep 19, 2026
Release Date
Sep 19, 2026
Language
English
OS
  1. Windows
  2. Linux
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Overview:
In Vacation to Earth, you play as Max, an alien janitor who has been "rewarded" for his hard work with an all-expenses-paid vacation on Earth. At least, that's what he's been told.
On Earth, you'll meet its overly friendly inhabitants, experience their rather unusual customs, and find yourself drawn into high-stakes strip poker matches where every defeat has consequences.
Can Max survive his vacation long enough to uncover why he was really sent to Earth?​

2DCG, 3DCG, SCI-FI, FURRY, MALE PROTAGONIST, HUMOR, TEASING, ORAL SEX,

PLANNED TAGS: VAGINAL SEX, ANAL SEX, TITJOB, HANDJOB
Extract and run
v0.5 Prototype
New Features

New Characters
Thalia — The Feline Queen


  • Added Thalia as a new playable opponent.
  • Introduced her Feline Queen mechanic.
  • Added special interactions with her servant.
Annie — The Favorite Servant

  • Added Annie as a new playable opponent.
  • Introduced her Servant of the Feline Queen mechanic.
  • Added special interactions with Thalia.

Character Traits
Character traits have been expanded and are now more integrated into gameplay.

  • Added new passive and active traits.
  • Traits can affect character behavior, special mechanics, difficulty, and rewards.
  • Character-specific mechanics are now easier to expand in future updates.

New Character Mechanics
Thalia — The Feline Queen


  • Added the Feline Queen trait.
  • Thalia can order her servant to strip instead of stripping herself.
  • Added interactions between Thalia and her servant during matches.
  • The mechanic changes depending on whether her servant is present.
LunaAna — The Cheater

  • Added the Cheater trait.
  • LunaAna can perform an additional strategic discard during a round.
  • The mechanic gives her an advantage without guaranteeing that she wins.
Lily / Annie — Servants of the Feline Queen

  • Added the Servant of the Feline Queen trait.
  • Servants can be ordered to perform special actions by Thalia.
  • Added special handling for servant-specific stripping events.
Reward System
The reward system has been expanded to better account for match difficulty.

  • Rewards now scale better with character difficulty.
  • Character traits can provide additional reward multipliers.
  • More difficult opponents and special mechanics can therefore provide greater rewards.
Consumables & Equipment

  • Added consumable limits and stack sizes.
  • Added support for permanent upgrades affecting inventory capacity.
  • Healing items can no longer exceed the player's maximum Health.
Permanent Upgrades
Added several permanent upgrades and unlocks.

  • Bigger Pockets
  • Character-specific passes
These upgrades are intended to provide long-term progression between matches.

Improved Match Logic
The poker match system has received several improvements.


  • Improved NPC discard behavior.
  • NPCs can now use character-specific mechanics during matches.
  • Improved stripping logic for characters with special traits.
  • Improved handling of defeated opponents.
  • Improved reward calculation.
  • Improved match cleanup and state resetting.
UI & Debugging
Character Selector


  • Improved the character selection system.
  • Improved opponent management.
  • Added better handling for special character requirements.
Debug Tools
Added a hidden Sprite Viewer for development and testing.

The viewer allows developers to inspect character sprites and their categories without having to manually start matches.

Balance

  • Adjusted character reward values.
  • Adjusted difficulty scaling.
  • Reduced the maximum stack of Red Chip Wild Cards from 5 to 3.
  • Bigger Pockets can increase the consumable capacity again.
  • Healing is now capped at the player's maximum Health.
Fixes

  • Fixed several issues with NPC state resetting between matches.
  • Fixed issues with defeated opponents remaining in the match state.
  • Fixed problems with special character mechanics not resetting correctly.
  • Fixed UI state persisting between matches.
  • Fixed several sprite and reaction handling issues.
  • Fixed various edge cases involving NPC stages and special interactions.
  • Fixed several issues related to consumables and Health.
Behind the Scenes
Version 0.5 also introduces several changes intended to make future development easier.

The internal systems for traits, events, character mechanics, rewards, and match logic have been reorganized to make it easier to add more complex characters and gameplay systems in future versions.

This update is therefore not only about adding content, but also about preparing the game for the next stage of development.

v0.4 Prototype
New


  • Luna & Ana
    • Added new beneficial events for Luna & Ana.
  • Character Selector
    • Reworked the opponent selection screen.
    • Added character sprites, information, descriptions and After Strip Lives.
    • Added navigation between unlocked characters.
  • Event System
    • Reworked the event structure to support general events and player-character-specific events.
    • Events can now be restricted to specific playable characters. (The playable character system is implemented, but it cannot yet be used in the game.)
Improvements

  • Reworked the opponent selection interface.
  • Improved consumable display during poker matches.
  • Improved the handling of Fold Coins and health-related events.
  • Fixed the card discard selection persisting between rounds.
  • Fixed the first card discard occasionally being ignored.
  • Fixed the Merchant allowing players to spend money when already carrying the maximum amount of an item.
  • Improved event handling and character-specific event logic.
  • Various UI, logic and stability improvements.

Important Fixes

  • Fixed crashes related to Custom Characters.
    • Fixed an issue where characters such as Laura could cause the game to crash when their dialogue or reaction data was missing.
    • Improved compatibility between Custom Characters and the new event system.

v0.3.5 Prototype
New


  • Caroline
    • Added a new event for Caroline.
    • Added a new defeat event for Caroline.
  • Ending System
    • Implemented the first version of the Ending system.
    • Players can now access character endings after successfully completing a poker match.
  • Lily
    • Added a new ending for Lily.
Improvements

  • Various bug fixes and stability improvements.

v0.3 Prototype
New


  • Custom Character System
    • Introduced the first version of the Custom Character system.
    • Custom characters can now include:
      • Poker sprites.
      • Dialogue.
      • Sequential events.
      • Choice-based events.
    • Although it's still an early implementation, adding this system now avoids having to refactor the entire game later. More tools and features for modders will be added in future updates.
  • Merchant
    • Added a new event for Merchant.
Gameplay

  • Lucky Charm fixed
    • Fixed a bug where the Lucky Charm item had no effect.
    • It now correctly increases the chance of random events occurring during poker matches.
Improvements

  • Improved several internal systems and game logic.
  • Various bug fixes and stability improvements.

v0.2 Prototype
- New Features:
Added Merchant as a new character.
Characters can now be unlocked through Permanent Upgrades.
Added several new Permanent Upgrades to the shop.
Added a public debug code ("givememoney") for players who simply want to test the available content.
NPCs now provide different rewards when defeated.
Losing a game now grants half of the accumulated rewards unless there is a active challenge.

v0.1 Prototype
- Initial release
Development Roadmap
Prototype

The foundation of the game. New ideas, mechanics, and systems are added and tested as much as possible. Things can be incomplete, experimental, or subject to major changes.

Pre-Alpha
The game is prepared for the Alpha stage. This means fixing bugs, completing unfinished mechanics, improving existing systems, and making sure everything works together properly.

Alpha
The main content-production stage. Events, scenes, character interactions, endings, and content for each playable character will be added at a much faster pace. Mechanics can still be improved or expanded during Alpha, but new content should remain compatible with the evolving game systems.

Beta
The game is essentially complete. Development focuses on bug fixing, balancing, optimization, compatibility, and final polishing. No major new content is planned during this stage for the time being.



Thank you for your patience while the game is still in development.

Feedback and bug reports are greatly appreciated. Every suggestion helps shape the future of the project.
Thank you for playing!

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