# Aback Games

> Free browser games you can play instantly on desktop and mobile. No downloads, no sign-up, no payment. Every game is single-player and runs in the browser; there are no accounts.

Every page has a Markdown version: add `.md` to its URL (the home page is https://abackgames.com/index.md), or request the page with `Accept: text/markdown`. The catalogue is also available as JSON at https://abackgames.com/api/games.json.

## Games

- [Blob Arena](https://abackgames.com/games/blob-arena.md): Start as a tiny blob in a big arena: eat pellets, swallow smaller rivals, split to lunge at prey and dodge anything bigger than you.
- [Turf Rush](https://abackgames.com/games/turf-rush.md): Draw loops out of your land to claim the arena square by square, cut through rivals’ trails and guard your own.
- [Tank Brawl](https://abackgames.com/games/tank-brawl.md): Drive a tank around an arena, shoot crystals for XP, level up, pick upgrades and a turret, and outgun computer rivals.
- [Coil Clash](https://abackgames.com/games/coil-clash.md): Grow a glowing snake in an arena full of computer rivals: eat orbs, boost past danger, and make rivals crash into your body.
- [Minesweeper](https://abackgames.com/games/minesweeper.md): Clear the minefield using the numbers as clues. Three levels, flags, chording and a first click that is always safe.
- [Snake Arena](https://abackgames.com/games/snake-arena.md): Steer a growing snake around the arena, grab snacks and bonus gems, and keep clear of the walls and your own tail.
- [Sudoku](https://abackgames.com/games/sudoku.md): Fill the grid so every row, column and box holds 1 to 9. Four levels, pencil notes, hints and your progress saved as you go.
- [Block Puzzle](https://abackgames.com/games/block-puzzle.md): Drag blocks onto the grid and complete rows and columns to clear them. Chain clears into streaks and keep the board open as long as you can.
- [Star Battle](https://abackgames.com/games/star-battle.md): Place one star in every row, column and coloured region, without letting any two stars touch.
- [Ball Sort](https://abackgames.com/games/ball-sort.md): Sort the coloured balls so every tube holds a single colour, moving them only onto a matching colour or into an empty tube.
- [Memory Match](https://abackgames.com/games/memory-match.md): Turn over two cards at a time and remember where everything is. Find every pair in as few turns as you can.
- [Solitaire](https://abackgames.com/games/solitaire.md): Classic Klondike Solitaire. Build four suits from ace to king, with Draw 1 or Draw 3, unlimited passes, undo and hints.
- [FreeCell](https://abackgames.com/games/freecell.md): The solitaire where every card is face up. Use four free cells to untangle eight columns and build the suits from ace to king.
- [Spider Solitaire](https://abackgames.com/games/spider-solitaire.md): The two-deck solitaire. Arrange ten columns into full suits from king to ace, with 1, 2 or 4 suits to choose from.
- [Mexican Train](https://abackgames.com/games/mexican-train.md): The classic dominoes game against three computer rivals: build your train from the hub, use the Mexican train, and empty your hand first.
- [Four in a Row](https://abackgames.com/games/four-in-a-row.md): Drop discs into the grid and line up four of yours before the computer does: across, down or diagonally.
- [Checkers](https://abackgames.com/games/checkers.md): The classic board game of jumps and kings. Capture every piece of the computer, or leave it with no move.
- [Bit Flip](https://abackgames.com/games/bit-flip.md): Flip bits to build each number in binary. How many can you make in 60 seconds?
- [Hex Hue](https://abackgames.com/games/hex-hue.md): Can you read a hex colour code? Match 10 colours to their codes, and codes to their colours.
- [Code Typer](https://abackgames.com/games/code-typer.md): A typing test for programmers: type real JavaScript, Python, Rust and SQL code against the clock.

## Categories

- [Arcade](https://abackgames.com/categories/arcade.md): Quick, skill-based games built around reflexes and high scores.
- [io](https://abackgames.com/categories/io-games.md): Arena games where you grow, battle and climb a live leaderboard.
- [Puzzle](https://abackgames.com/categories/puzzle.md): Games about logic, patterns and planning ahead.
- [Card](https://abackgames.com/categories/card-games.md): Classic solitaire card games, dealt fresh every time.
- [Strategy](https://abackgames.com/categories/strategy.md): Games where careful decisions matter more than speed.
- [Developer](https://abackgames.com/categories/developer-games.md): Games for programmers: binary, hex colour codes and typing real code.

## Guides

- [Minesweeper patterns: how to read the numbers](https://abackgames.com/guides/minesweeper-patterns.md): The handful of number patterns that solve most Minesweeper boards, why each one works, and what to do when logic runs out.
- [Sudoku techniques, from singles to the X-wing](https://abackgames.com/guides/sudoku-techniques.md): Every technique you need to solve Sudoku without guessing, in the order the puzzles ask for them, with a plain explanation of why each one works.
- [Solitaire strategy: how to win more Klondike games](https://abackgames.com/guides/solitaire-strategy.md): Practical Klondike tips: where to look first, why an empty column is only useful with a king, when to hold cards back from the foundations, and how Draw 3 changes things.
- [io games tips: survive longer and climb the leaderboard](https://abackgames.com/guides/io-games-tips.md): The habits that keep you alive in any io arena, plus specific tips for snake, blob, territory and tank games.
- [FreeCell strategy: plan the deal, keep the cells free](https://abackgames.com/guides/freecell-strategy.md): FreeCell is nearly all skill. How to read a deal, why empty columns are worth more than free cells, and how many cards you can move at once.
- [How to solve Star Battle puzzles](https://abackgames.com/guides/how-to-solve-star-battle.md): The rules of Star Battle and the logical steps that solve it, from small regions to counting regions across several rows.
- [Mexican Train dominoes: rules, scoring and strategy](https://abackgames.com/guides/mexican-train-rules.md): The full rules of Mexican Train dominoes, how scoring works, the house rules families argue about, and a plan for keeping your score low.
- [Spider Solitaire strategy for 1, 2 and 4 suits](https://abackgames.com/guides/spider-solitaire-strategy.md): How to approach Spider Solitaire at every suit setting: building in suit, making and keeping empty columns, and timing the deals from the stock.
- [Ball sort puzzle strategy: how to solve every level](https://abackgames.com/guides/ball-sort-strategy.md): Why empty tubes matter most, how to plan two moves ahead, and what to do when a ball sort puzzle seems to have no way forward.

## Free tools

- [Dice Roller](https://abackgames.com/tools/dice-roller.md): Roll up to 12 fair dice at once, from d4 to d100, with the total worked out for you.
- [Coin Flip](https://abackgames.com/tools/coin-flip.md): A fair heads or tails in one tap, with a running count of every flip and your current streak.
- [Random Number Generator](https://abackgames.com/tools/random-number-generator.md): Pick one number or up to 1,000 from any range, with or without repeats, ready to copy.
- [Sudoku Solver](https://abackgames.com/tools/sudoku-solver.md): Type or paste any 9 × 9 Sudoku and get the solution, plus a check that the puzzle has exactly one.
- [Score Keeper](https://abackgames.com/tools/score-keeper.md): A simple scoresheet for 8 players or fewer: enter each round and the totals and leader update for you.

## For developers and agents

- [Developers](https://abackgames.com/developers.md): the catalogue API, Markdown pages, agent skill and in-browser tools
- [Catalogue API](https://abackgames.com/api/games.json): every published game as JSON
- [OpenAPI description](https://abackgames.com/api/openapi.json)
- [Agent skill](https://abackgames.com/.well-known/agent-skills/find-and-play-games/SKILL.md): how to find, recommend and explain games

## Optional

- [All games](https://abackgames.com/games.md)
- [About](https://abackgames.com/about.md)
- [Privacy policy](https://abackgames.com/privacy.md)
- [Contact](https://abackgames.com/contact.md)