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The Arcade

100 levels · 5 checkpoints

Timeline

XP
–
Stars
–/300
Cleared
–/100

100 source-backed levels through AI history, dates hidden until you commit. Decks grow from 5 to 8 cards, milestone familiarity rises, and evidence intervals tighten across five reviewed checkpoints. You get 3 lives, a boss with 2 lives guards every twentieth level, and every miss still teaches, because wrong cards snap to their true spot.

How to play

Timeline

Each level deals a source-backed hand of AI milestones, dates hidden. Place every card where it belongs. Decks grow from 5 to 8 cards across five reviewed checkpoints, and every miss corrects itself into the true timeline.

Scroll to see all 3 steps

  1. Step 1

    Read the card

    Each card names a milestone: a paper, a match, a launch. The date stays hidden until you commit.

  2. Step 2

    Pick a slot

    Tap a dashed slot between cards: before, between, or after. Relative order is all that matters.

  3. Step 3

    Survive on your lives

    A miss costs a life, and the card still snaps to its true spot so the timeline stays correct. Normal levels give 3 lives, bosses 2. Finish the deck with a life to spare to clear; a perfect run scores 100 for three stars, and one miss lands at two.

Checkpoint 1 · Levels 1-20

Origins

0/20 · 0★

Checkpoint 2 · Levels 21-40

Turning Points

0/20 · 0★

Checkpoint 3 · Levels 41-60

Acceleration

0/20 · 0★

Checkpoint 4 · Levels 61-80

Dense Decades

0/20 · 0★

Checkpoint 5 · Levels 81-100

Through the Eras

0/20 · 0★

Season leaderboard · timeline XP

Time lords

Signed-in players rank by server-graded XP. Replays add only the improvement over your previous best. Ties break by stars, distinct levels, then the earliest achievement.

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Timeline — Order the AI Milestones | Let's Data Science