Now that was unexpected. This game is basically just a re-skin of Doom, but also it's just not. While the exact subgenre, the feel and the flow are nearly identical, the animation is even juicier and the sound is even more impactful. The art-style is a peach, the level design is comprehensible and thematically nice and as an addition to the mechanics we have an inventory with a selection of items, most of which are actually useful. This is a rare fantasy FPS and we don't really have much of them to this day. This game is a thing to experience and is one of the best games i've experienced, even (or especially) in the context of 2010s.
Shadow of the Serpent Riders
Just like almost every other expansion of that era it offers more of the same as the base game, but with an instant difficulty spike due to (intentionally?) poor balance and inferior maps. But also it doesn't add new enemies or weapons.