If you think running around for 80% of the time trying to figure out where to go next is fun, this game is for you.

Was so peak, had me hooked until the very end, would highly recommend it and it's sequel!

I like fan-made addons. Sometimes they greatly expands experience giving more of cool stuff within a cool iconic game!
But not all addons, even with good rating, are actually good. Who on Earth thought puzzles about collecting 3 car batteries are good?! Especially when puzzles dominating over combat.
Fan-made levels tends to use ALL elements from original game, sometimes simultaneously. This entropy-zero is no exception. Uses to much elements at once with dubious fun.
Needs a simpler formula - less stuff, more of shooting.
At least it's free.