Introduction
One-Time Trade Master is a pixel-style RPG inspired by Poké X Master.
From pixel art, game flow, to the starting village map, it feels nostalgic.
Despite being an adult game, its story and plot arrangement stand out uniquely.
Conversations in the developer room hint at deeper details.
Main Story and Setting

The protagonist is a loser in a world where everyone lights up their Astro Charts.
Only he can’t.

He also owns a unique Yarimono named Chickup that can communicate with him.
However, their battle skills are trash—

they lost 99 times to their childhood friend Kogari, paying ¥1,000 each loss, totaling ¥99,000.

On the 100th battle, Chickup learns Cheat Charge: guaranteed hit, guaranteed kill.

With this, they finally win. Kogari then declares: “If you win, you gotta do X!”

A new rule sets in: Victory Equals Violation.

For one hour after winning, compensation becomes a physical interaction instead of money.

This is accepted by everyone in the game world.

From here, the protagonist aims to become the Allymon Battle Championship winner,
collecting Yarimono and compensation records along the way.

Battle Pet System: Yarimono
Allymon levels max out based on the trainer’s level, which increases by defeating other trainers.

Winning also earns Compensation Time.
This system ensures efficient gameplay progression.
Gameplay Strategy Tips
Yarimono Catching Strategy

- No need to buy extra Astro Charts; an NPC gives you 10 for free in the starting city
- Catch two Yarimono from Water, Fire, Wind, or Rock types to cover weaknesses effectively
Level Crushing Everything
Later in the game, rely on higher levels to win easily, ignoring attribute matchups.

Green Mushroom Upgrade
One Green Mushroom equals one trainer level up.

Important early-game item.
Always watch for them while exploring.
Quick Travel: Magic Broom

Steps to unlock:
- Go left from Big City to Seaside Path
- Trigger event with witch
- Go up to Church, defeat witch on the second floor
- Finish Compensation, then talk again to get the broom

Collectibles and Endgame Content
72 gentleman scenes across base game and DLC1, DLC2.

Some characters have multiple sets.
Even if not interested in full completion,
finish one full story run and visit the Development Building in Big City to unlock secrets linked to the starting city.

Game Information
- Game Title: One-Time Trade Master
- Overview: Weakest protagonist and Allymon learn an overpowered move, aiming for championship and world mysteries
- Supported Languages: Traditional Chinese, English, Japanese, Simplified Chinese
- Story: ★★★★★★
- Practicality: ★★★★☆
- Gameplay: ★★★★★★★
- Cost-Performance: ★★★★★
- Playtime: 15–20 hours (base game + DLC1 + DLC2)
- Steam Price: NT$670
- Steam Reviews: 87% Overwhelmingly Positive
That’s all aboard for today’s gentleman game train, see you next time