A four-in-a-row drop game with the lights off, where you track column heights to infer your rival's hidden discs.
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How to play
Take turns dropping a disc into a column, where it settles on top of the stack. Column heights are public, so you always know how full each one is, but your opponent's disc colours are fogged. You see that a cell is filled without knowing whose it is, so you must deduce their plays.
Drop a disc into any column with room
Line up four of your discs horizontally, vertically or diagonally to win
Column heights are visible to both players
Enemy disc colours stay hidden until a line is revealed
Controls
Desktop: click a column to drop, hover to preview
Phone & tablet: tap a column
Game modes
Versus CPU on Easy, Medium or Hard, with you moving first
Two-player hotseat with a pass-device curtain
Online play
Tips & strategy
Use column heights to reconstruct where your opponent likely dropped
Build multiple threats so a single hidden block can't stop all of them
Watch for a height jump you didn't make, which signals an enemy disc just landed
About Dropline Fog
Dropline Fog is an original free browser take on the four-in-a-row drop game, adding fog-of-war deduction to the familiar gravity grid. Play instantly, no sign-up.
A free, original browser game on PlayPendium. No download, no install.
