Traditional Client/Server Online Multiplayer
Host or connect to others' games and enjoy a fully customizible online multiplayer experience. Uses TCP and UDP sockets for reliable and rapid client/server messaging respectively; this is all powered by KryoNet
2D Rigid Body Dynamics
Risingear implements and exposes a physics engine based on JBox2D. This provides functionality for realistic collisions and movement of objects.
Scripting
All game code is written in Lua (LuaJ). It is moddable with a provided LDT Eclipse API for client and server functions necessary to build and host a custom game!