When comparing SpaceChem vs Limbo, the Slant community recommends Limbo for most people. In the question“What are the best Puzzle games on Steam?” Limbo is ranked 7th while SpaceChem is ranked 10th. The most important reason people chose Limbo is:
Since there are no cutscenes or loading screens, Limbo makes you fully immerse yourself in the puzzles and atmosphere of 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 Immerses the player fully
Since there are no cutscenes or loading screens, Limbo makes you fully immerse yourself in the puzzles and atmosphere of the game.
Pro Does not become frustrating even if you die a lot
Most players die a lot in Limbo. fortunately this does not translate to a frustrating experience while playing the game. If you die from a trap, the game immediately reloads and takes the character right before reaching that very same puzzle. This way you can try again immediately and find a solution.
Pro Quite addictive
Limbo manages to keep your attention all throughout the game by consistently presenting new, interesting things for you to solve. It starts out simple, but increasingly gets more intricate and grows into smart multi-part puzzles.
Pro Unique black and white aesthetic
Limbo uses (what was once) a very unique monochromatic color scheme to give an atmospheric feel.
Pro Good for people who don't want to waste too much time on a game
Being a relatively short game (five or six hours long), it's perfect for people who love interesting puzzle games that don't overstay their welcome.
Pro Astonishing sound design
The sound design is simply great. Even though there's virtually no soundtrack to speak of, the sound effects do a great job of creating the perfect atmosphere in which the players immerse themselves.
What's more is that if you pay close attention to the sound cues while solving a puzzle, you will find out that the sound effects are quite helpful in reaching your objective.
Pro Manages to communicate circumstance and casualty in a unique way
Being completely devoid of text, dialogue, and explanation Limbo manages to communicate circumstance and casualty to the player in a simple way not found in other games.
Having a game completely devoid of those three things is hard but Limbo manages to pull it off perfectly.
Pro Artistic puzzle
Limbo has very unique environment with highly creative puzzles that offer a great experience with monochrome, b/w and other dim colors.
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 Ending comes somewhat abruptly
There's little lead up to the ending so it comes a little too suddenly and unexpectedly.
Con May be too dark for children
The game, by design, has the main character dying quite a bit, often very gruesomely, and so may not be appropriate for younger players.
Con Somewhat short
Limbo can be finished in about 5-6 hours on average.
Con Has some pacing issues
The first half of the game is filled with interesting creatures that you as a player encounter on the journey. While in sharp contrast, the second half of the game takes place in a deserted industrial area devoid of any lifeforms and even though puzzles become more and more interesting as you approach the end of the game, this sharp contrast between the two halves of the game creates some serious pacing issues.
The pacing issues are even more evident as you reach the ending, which while good comes quite unexpectedly.
Con Keyboard controls not that good
Movement is locked to the arrow keys instead of wasd.