The AMC Squad is an epic story-driven FPS running on the Build Engine. It combines gameplay mechanics of retro-shooters with aspects of modern titles, complete with a story-driven narrative that spans over several episodes. Each episode is a full-length campaign featuring multiple varied locations to explore and many hidden secrets and collectibles to discover. Experience an overarching story that is loosely based on the worlds and settings of other classic Build Engine games. Pick from more than 8 different character classes, each with a unique loadout of items, weapons and abilities, and fight a large selection of different enemy factions that threaten the safety of the game world.
Those are some pretty detailed environments
The great thing is that they're really not that detailed. They're just well-textured to give the appearance of lots of detail. Good-looking results and quick to make. Win-win.