Station 51 is a single player mod for Half-Life 2: Episode 2. You are on the run from the Combine closing in on your outpost. Can you escape?
You have talent for this, keep making more.
I really like the environments I got to fight in throughout the game, especially at the beginning. Wide areas with numerous avenues for attack and retreat. The mod was also legitimately challenging on hard mode. By far one of my favorite excursions into Combine land.