Bos Wars is still a nice fast-paced and somewhat lightweight RTS for you to enjoy, even though the sound mixing is still brutal but getting your hands on the latest Version for Windows is not as straightforward, as it was in 2010.
Thankfully, you can get a working version for Windows from Portableapps.
The cool 3D pixel soldier in the thumbnail above is from OpenGameArt by the way. Still kicking, old design and all.
- BosWars homepage