"It's pretty simple and easy map. You are heading home and are near Stroggos, when suddendly the engines stop working and you shipwreck on the planet. There's nowhere to hide. You have to kill all the Stroggs and leave Stroggos by going through the Stargate to Earth...."
Wow, reminds me of the early custom made Quake 2 SP maps that came out in early '98 - the very best early Q2 user-created map was "Death is not worth trying" - good times :)