This weekend is the last chance to pre-purchase Portal 2. Get your copy now, save 10% and be ready to play the moment it is released.
Help release Portal 2 early: From now until release, play any or all of games in The Potato Sack to expedite the launch of Portal 2. Your efforts will be tracked on the official GLaDOS@home page.
Each game in The Potato Sack has received a massive Portal-themed update, making a collection of 13 hit indie games even better. So why not get a taste of Portal 2 now while you help launch it?
Cogs is a puzzle game where players build machines from sliding tiles. Players can choose from 50 levels and 3 gameplay modes. New puzzles are unlocked by building contraptions quickly and efficiently.
Inventor Mode: Starting with simple puzzles, players are introduced to the widgets that are used to build machines gears, pipes, balloons, chimes, hammers, wheels, props, and more.
Time Challenge Mode: If you finish a puzzle in Inventor Mode, it will be unlocked here. This time, it will take fewer moves to reach a solution, but you only have 30 seconds to find it.
Move Challenge Mode: Take your time and plan ahead. Every click counts when you only get ten moves to find a solution.