Make 21. Trigger the chain.

02 / Your card

Tap a reactor to launch. Or drag the card to a core.

1–4 launch U undo

◈

Coming next

H hint Space cycle

ORBIT 21 · 52-card solo strategy · J / Q / K = 10 · A = 1 or 11 (automatic) · No installs or external libraries · Saves progress locally

ORBIT 21 — Free Browser Card Puzzle

Play ORBIT 21 in your browser: a free 52-card puzzle with Arcade, Zen, Blitz, and Daily modes, power-ups, and locally saved progress.

What this game does

ORBIT 21 is a single-player, solitaire-inspired card puzzle. Route cards from a standard 52-card deck into four reactor piles, trying to reach 21 without overloading a reactor. Face cards count as 10; an Ace automatically counts as 1 or 11.

When to play

Choose Arcade for the full run, Zen for a more relaxed game, Blitz for a 120-second challenge, or Daily for the day's fixed shuffle.

Who this is for

Card and puzzle fans who like planning several moves ahead. This is a solo strategy game with no account, multiplayer, wagers, or real-money purchases.

How to play

Select a mode and draw the current card.
Choose one of the four reactors for the card. Build toward 21 to bank a successful run of cards; an overload can cost a shield in modes that use shields.
Use card-cycle, hint, undo, and reactor power-ups when available.
Route through the deck, manage shields, and earn points for successful reactor clears and the run-end bonus.

Inputs and controls

Pick a game mode, choose a reactor, and optionally use cycle, hint, undo, Overdrive, or Patch Shield. Keyboard shortcuts include 1–4 for reactors, U for undo, H for hint, Space to cycle, and Escape to close a panel. Sound and motion can be adjusted.

Outputs and saving

The game displays scores, reactor totals, shields, power-ups, and best-run records. Current runs, preferences, and records are saved locally in this browser, not to an account or server. There is no export or cross-device sync.

Example strategies

Plan card placement across all four reactors instead of filling one pile at a time.
Use Zen to practice reactor management or Blitz to test fast decisions.
Save a hint or shield repair for a difficult draw, and use undo to reconsider a recent move.

Frequently asked questions

Is this blackjack or gambling?

It is a solo 21-point card puzzle inspired by blackjack. There are no bets, cash prizes, or real-money purchases.

Is my progress saved online?

No. Progress and preferences are saved locally in the browser you play in.

More games to play in your browser

Need a custom browser game?

SolvProb builds custom web apps, games, automation tools, and interactive experiences.

Talk to SolvProb →