Here are some of my old maps I’ve made for CS:S.
Fight on a space station made of small unique platforms flying in space. Includes: rainbow laser bridge, gas-station, and even a garden.
With a invisible wall keeping you apart from the enemy you have to jump down a hole into a mini-arena. Each arena have its own theme and features a teleport back to the start.
And yes, I also made a Minecraft map for CS:S.