When comparing Terasology vs Avorion, the Slant community recommends Terasology for most people. In the question“What are the best voxel-based games for the PC?” Terasology is ranked 9th while Avorion is ranked 10th. The most important reason people chose Terasology is:
Java is well documented.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Well written in Java
Java is well documented.
Pro Nice looking
Shaders, bloom, film grain and other effects can be enabled.
Pro Free sandbox alternative
The game is inspired by other titles like Minecraft and Dwarf Fortress.
Pro Fully moddable
In the game you can create a mod and submit it as a module. You can select multiple modules when you make a new world.
Pro Extremely modular
The engine allows mix-and-match of features that you need.
Pro Active community
The community is very active in the development of the game, they participate regularly to Google Summer of Code and Google Code In.
Pro Can be Minecraft competitor
An open source alternative, fully customizable; easy mod support based on module pieces.
Pro Beautiful, new and fun
The game is beautifully made. The visuals are fascinating. The ship building process is not traditional. You can build any kind of ship you like.
Weapon variety is huge.
Game mechanics are smooth and easy to understand.
Less graphical requirements. It works like a charm even on on-board graphics, though OpenGl graphics are known to cause problems in the games and slight lag/performance issues.
Almost everything is available in the Demo version. The demo map is huge enough that it'll take you 2-3 months to explore if you play everyday for 2-3 hours. Plenty of weapons are upgrade options in the demo version.
Multiplayer on LAN and Internet and Hosting capabilities, making it easier to play with your friends
Pro Free Demo
The demo of this game is available from the official website. The demo offers all the features of the game but in limited quantity. You can build custom ships but certain blocks are not available in the demo version, certain weapon types and logic upgrades are also not available in the demo version.
Cons
Con Buggy
Con Unstable
Con Slow
Con Time consuming
Be prepared to invest a lot of time, this is not a game for the impatient!
Con Slow updates for Demo Version
The devs are concentrating more on the full version. The demo version has not been updated since the last released (2016) 8.1.5 .
8.1.5 is stable but no major/minor updates have been seen so far.