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One Part Each: Chain Reaction

One Part Each: Chain Reaction

920 plays 4.6 out of 5

Overview

Sometimes a brilliant machine is missing just one part. Choose a ramp, spring, bumper, fan, magnet, gravity field, or conveyor. Place it on the blueprint, find the right angle, and start the mechanism. Guide Spark past the obstacles, collect the gears, and reach the portal. The game includes: • 24 handcrafted puzzles across four chapters; • a shared six-link Daily Machine; • an endless challenge built for high scores; • link-based relays you can continue with friends; • free hints with no mandatory ads; • one-finger, mouse, and keyboard controls; • English, Russian, and Turkish interfaces; • local progress with no sign-in required. Every blueprint follows one simple rule: you may add only one part. There can still be more than one ingenious solution. Experiment, collect every gear, and turn physics into mechanical poetry!

Videos and screenshots

  • One Part Each: Chain Reaction screenshot 1
  • One Part Each: Chain Reaction screenshot 2
  • One Part Each: Chain Reaction screenshot 3
  • One Part Each: Chain Reaction screenshot 4
  • One Part Each: Chain Reaction screenshot 5
  • One Part Each: Chain Reaction screenshot 6
  • One Part Each: Chain Reaction screenshot 7
  • One Part Each: Chain Reaction screenshot 8
  • One Part Each: Chain Reaction screenshot 9
  • One Part Each: Chain Reaction screenshot 10
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12,669 players online

How to play

  1. Open the game

    Press Play now and the game opens on its own screen.

  2. Follow the in-game instructions

    The controls and goals are shown inside the game as you play.

  3. Use the game menu

    The floating button over the game reloads it, saves it to your favourites, or takes you back out.

Game instructions

1. Choose one part at the bottom of the screen. 2. Drag it into the dotted area of the blueprint. 3. Rotate it with the on-screen buttons or Q/E. 4. Select “Launch,” or press Space/Enter. 5. Guide Spark into the portal and collect as many gears as you can. Keyboard: arrow keys move the part, Q/E rotate it, Space or Enter launches, R resets, and Esc pauses. On mobile, every action is available by touch.

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