When comparing SpaceChem vs World of Goo, the Slant community recommends World of Goo for most people. In the question“What are the best PC games that don't revolve around killing people?” World of Goo is ranked 9th while SpaceChem is ranked 22nd. The most important reason people chose World of Goo is:
A lot of attention has been put into creating interesting levels with great pacing and variety throughout the game.
Specs
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Pros
Pro Could help with real life programming skills
In particular, abstraction and concurrent programming skills could be gleaned from the game as it uses broad techniques often used by computer programmers.
Pro Easy to learn, hard to master puzzle
Spacechem's mechanics are pretty simple to learn and only takes minutes to understand how the game works. Of course mastering the gameplay is a whole different matter.
Pro Allows for short or long play sessions
The gameplay allows for a player to come in and solve a single puzzle in a short amount of time or to sit and tinker with a puzzle for hours trying to devise the perfect solution and contraption. It all comes down to what one want to put into the game but the free form of the puzzle solving is what makes it great for anyones playstyle be it short or long.
Pro Light on the system
The system requirements are quite low at only requiring a 2Ghz processor, 1G of ram and 300MB of hard drive space. Basically this game should work on just about any computer from the last 10-15 years.
Pro Endless gameplay through user created solutions
An individual players choices of components, arrangements or factories used will result in completely different experiences and problems/puzzles when compared to another users experience. A truly individualized experience that expands the games replayability.
Pro Great variety in puzzles
A lot of attention has been put into creating interesting levels with great pacing and variety throughout the game.
Pro Beautiful visual style
World of Goo is pleasing to look at. Most of the time it's very colorful and joyful, but it changes from time to time to reflect different parts of the world. Nevertheless, it is stylistically well presented throughout the game.
Pro A twisted tale
As you start playing there doesn't seem to be much of a story. A few philosophical messages left behind by the Sign Painter and a cut-scene here or there. But as you progress through the game you unearth different details about a slightly disturbing world.
Pro Good, funny music
Each level has good and very funny music.
Pro Excellent physics engine
Physics in-game take into account gravity, wind, weight of different goo-balls, structural integrity of your architectural solutions to create an addictive, "let me try this one more time"-type of gameplay.
Cons
Con Annoying action-y 'boss' stages
At the end of each 'world', there is a boss stage in which you have to perform a unique task. This wouldn't be too bad, but in these levels, you can use blocks that you can activate in real time to change the way your program runs. This often means lots of manual work and a lot of padding to hit the buttons at the right time, which is unnecessary for a puzzle game (and, given that you cannot rewind, also stressful if your program is very tight). I would imagine that the best scores for these levels also overly abuse this feature to make solutions that would be almost impossible without use of macros, for instance.
Con Late game is difficult
In later levels some players may reach a point where the game has become too difficult or frustrating, which may discourage any more play time with the game.
Con No co-op mode
The PC version does not include the co-op mode that was included in the Wii Ware version.