EARLY ADOPTER BONUS

Get German Core 1000 (normally $4.99) FREE when you buy during launch. Esperanto Core included permanently.

About This Game

FlashBoss Vocabulary Builder

A retro vocabulary game built on spaced repetition and boss fights. FlashBoss does one thing and does it well: it puts words into your head and keeps them there. No note-taking, no busywork — just read, listen, repeat, rate, fight! Free English course included.

Sharpen the Words You Already Half-Know

English Adept is the flagship course, and it ships free with the base game. 1,000 words — the ones you recognize in articles, contracts, and books but couldn't quite define if pressed. Precise verbs. Subtle emotions. The vocabulary of critical thinking: nuance, implication, contingency, restraint. Every word comes with a definition, example sentences, synonyms, and usage notes.

This is vocabulary for thinking clearly and reading without friction — the difference between following an argument and weighing in. Five tiers, forty thematic clusters, graded so each step builds on the last.

A quick session before you start your gaming night? It takes as little as 5 minutes. Your future self will thank you.

How It Works

Rate each flashcard from 0 to 5. Spacing follows Fibonacci intervals — the better you know a word, the longer before it comes back. When you've mastered a cluster, a boss fight gates your progress: a see-sawing battle where correct answers drive you forward and mistakes push you back. Win, and the cluster graduates. Your deck gets smaller over time.

Maintain your daily streak to earn Drive — banked days off for when life interrupts.

Included Free with the Base Game

• English Adept — 1,000 words, critical reading vocabulary

• German Core — 1,000 words, ready for A2 immersion class

• Esperanto Core — 1,000 words, will get you very far

Every pack includes native text-to-speech audio, real example sentences, usage notes, and structured reference lessons. Five to thirty minutes a day depending on which master you choose.

Learn a Foreign Language — DLC Packs ($4.99 each)

Full 3,000-word courses per language: Core, Pareto 1, and Pareto 2. Same boss fight system, same audio, same structure. All sold as paid DLC.

• Spanish — Core, Pareto 1, Pareto 2

• German — Pareto 1, Pareto 2 (Core included free)

• Esperanto — Pareto 1, Pareto 2 (Core included free)

• Italian — Core, Pareto 1, Pareto 2 (rolling out April–May)

The English Roots Series — DLC, Coming Soon

Four root systems that explain the shape of English. Each sold as paid DLC.

German Roots — the Germanic backbone of everyday English

Norman Roots — the doublet mirror, 1066 and after

Latin Roots — constructing words from their parts

Greek Roots — prefixes, stems, and suffixes

Choose Your Master

Six masters, six teaching styles, six session limits — from Luna's gentle pacing to Odiin's stoic warrior-poet discipline. Ranges from 8 to 34 cards a day, roughly 5 to 30 minutes.

• 🐺 Luna — gentle and encouraging, 8 cards per day

• ⚫ Claude — analytical and precise, 13 cards per day

• 🐉 Shen — stern and direct, 13 cards per day

• 🦉Odiin — master and founder, 21 cards per day

• 🦊 Kitsune — playful trickster, 34 cards per day

• 🦅 Aquila — noble and disciplined, 34 cards per day

Why Terminal?

Lightweight. Distraction-free. Runs on anything. Language learning shouldn't need a gaming rig. FlashBoss also has caching built in — open the in-game help menu to learn more.

What You Get

• The full game with three included packs

• Spaced repetition tuned for long-term retention

• Boss fight testing on every cluster

• Six masters with distinct personalities and pacing

• No subscriptions. No ads. No internet required after download.

Setup

• Windows 10+ (Windows Terminal recommended for emoji support)

• macOS 10.15+ / Ubuntu 20.04+

• Numberpad recommended, but not required

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI was used in the coding of this game, the asset generation, brainstorming practical solutions (knowledge about opensource tts options, distribution options), and in helping problem solve most steps in the development, and application process. It allowed one developer to create a high quality, low cost educational product to greatly assist in language learning worldwide.