When comparing Terasology vs OpenTyrian, the Slant community recommends OpenTyrian for most people. In the question“What are the best open-source games?” OpenTyrian is ranked 32nd while Terasology is ranked 79th.
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 There's a lot of weapons and levels
Pro You can play it as a single player or 2-player co-op on the same machine
Pro Classic Starship game with amazing graphics even today
It's a game that's over 20 years old but it still has amazing graphics for a 2D game.
Pro More cross-platform than anything (except Doom)
Has been ported to so many platforms that it even can be found on your phone!