OK, I finally played the famously classic DOOM in its entirety for the very first time in my life, and I must say it really felt like this kick started fast-moving action in many FPS nowadays, and has an unique gritty, oxidized art style that really puts the scene in where you are, which is Mars, fighting different alien enemies. Badass concept and badass execution, with a very good soundtrack that sets it in when you're picking fights with these non people.

For its time, it was a very unique concept, and nowadays I feel like it still holds some of its greatness, it's very different than the usual run-and-shoot and the level layouts offer the possibility of exploration as you have to collect keys, (although with me playing in GZDoom with free mouse look and the ability to jump it was very easy to cheese some obstacles) and every level is different, yet similar, which brings me to the one con this game has.

For the longest time of my life, I thought this game only had one chapter. You played through so many levels of it and defeat the Barons of Hell and that was it, but little to my surprise it actually wasn't the end of it, I still had 2 more (and Thy Flesh Consumed that is only included in The Ultimate DOOM) chapters to go through, and this sadly made me a little bit worried, because I always thought this game was a sweet short experience that led to DOOM II: Hell on Earth, but there were a complete set of maps I needed to play, and with a lot of them feeling the same, with some maze-y layouts and other stuff it felt very repetitive.

But that's by far, my only complaint with it. I enjoyed everything else and it was a nice surprise to know that this game was this ambitious for its time.