new entries

strategy/spring.md

@@ -0,0 +1,20 @@
+# Spring RTS engine
+
+_Game engine for real-time strategy (RTS) video games._
+
+- Home: https://springrts.com/wiki/Main_Page
+- Wikipedia: https://en.wikipedia.org/wiki/Spring_Engine
+- Download: https://springrts.com/wiki/Download
+- State: mature
+- Type: RTS
+- Code: https://github.com/spring/spring
+- Language(s): C++, C, Lua
+- License: GPL-2.0
+
+See also [Spring 1944](http://spring1944.net/) a special scenario of the spring engine (code: https://github.com/spring1944/spring1944).
+
+Or [ZeroK](http://zero-k.info/) another game using SpringRTS.
+
+## Building
+
+Uses CMake