When comparing Buildbox vs Oxygine, the Slant community recommends Oxygine for most people. In the question“What are the best 2D game engines?” Oxygine is ranked 18th while Buildbox is ranked 51st. The most important reason people chose Oxygine is:
Most interesting is ability to build C++ Oxygine application for Web via Emscripten. So you write C++ code and it will compile it to HTML5/JS.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Drag - and - drop editor
Drag - and - drop editor without writing any line of code.
Pro Easy to learn
Buildbox is a drag and drop engine, making it easy for beginners to pick up. There are many tutorials available to help get you started.
Pro Has many game templates
Buildbox has 20+ different game templates including templates for platformers, racing games and Flappy Bird clones.
Pro Built-in support for ads
You can add banner and interstitial ads from multiple ad networks, including AdMob, RevMob, Facebook. They can work with Amazon's, Microsoft's, Google's and Apple's app stores.
Pro Develop once publish everywhere
Exporting iOS/Android/macOS/Windows/Steam/Amazon
Pro Cross-platform
Pro Games can be built as HTML5 applications
Most interesting is ability to build C++ Oxygine application for Web via Emscripten. So you write C++ code and it will compile it to HTML5/JS.
Pro Functionality can be extended with a bunch of available extenions
All of them available publicly at github.
- oxygine-movie for playing Theora movies with alpha channel
- oxygine-sound player for ogg sound/music with streaming
- oxygine-freetype library
- oxygine-billing for in-app-purchases on Android/iOS
- oxygine-spine for playing Spine animations
- oxygine-magicparticles for playing particles made with MagicParticles
Pro Will be familiar to users of ActionScript3/Flash API
If you are familiar with ActionScript3/Flash API, then you will find it easy to begin working in Oxygine. Oxygine is much like Flash in C++, as its Event Handling model is very close to that of ActionScript 3 and SceneGraph.
Pro Easy to use C++ API with optional C++11 features
Oxygine is written in C++. It provides easy to use API, which is designed with "do more with less code" philosophy. It uses a managed scenegraph system that takes care of rendering and updates, and provides ability to extend with custom rendering and updates.
Pro Free, open source and cross-platform
Oxygine is a free framework that works on OS X, Windows, Linux, iOS, Android, HTML5. It's licensed under MIT with source code available on GitHub.
Pro Robust
It's very rare to experience bugs with Oxygine.
Pro Allows playing movies with alpha channel
Using oxygine-movie extension for Oxygine you could play in your game any videos encoded with Theora codec.
You movie could have alpha channel and used as simple sprite instead of classic spreadsheet animations.
Pro Allows for flexible contol over draw processes
Pro Fast
Cons
Con Incredibly Expensive
$99/mo for full functionality probably makes this the least accessible piece of game development software in regards to price, all with a very limiting feature set.
Con You are restricted by it's limitations
For example, you can only make certain kind of games.
Con Not very powerful
You will be limited to using templates to build games.
Con Subscription Model
The two more reasonable price points limit the functionality of a software already far less powerful than many more cost effective alternatives.

Con Very expensive
Buildbox has a 15-day trial version, after that a $2675 license to use it must be bought.
Con Stability Issues
The software has stability issues on Windows, with the preview window causing program crashes when simple functionality is added.
Con Inactive
The project does not seem to be active: there has been no new commit since mid-2019, the Twitter feed for the engine stopped posting news in 2018, and the forum is offline as of May 2021.
Con Little community support
Oxygine is a young framework. It was first released in 2013 and has yet to gather a large community. As of February 2016, the forum had just 123 members.
Con Not many tutorials available
There are not many tutorials available that teach developers on how to make a game with Oxygine from scratch. Because of this, it may be harder to pick it up or to start learning game development by using this engine.
