For the best experience, play with shaders, and play in Hardcore mode.

The creatures surrounding you have decimated the solar system. With four guns to your name, your mission is simple:

Kill The Parasites can be, and has been, described as many things. RPG-esque, FPS, Hack n' Slash, Run n' Gun, or anything else along those lines. In this pack, your entire means of progression, and all forms of resource gathering -- health, food, weapons, ammo, etc. -- comes from killing parasites. Every tier of parasite reaps different rewards upon killing it, making it an incredibly violent Chess Game.

GAMEPLAY & FEATURES

Modern and industrial world-gen, including overhauled Lost Cities and scattered Modern Ruins.
Four tiers of guns, and 60+ guns to come across, all either with changed stats, textures, sounds, or all three.
Many fun movement options, such as Squake B-Hopping and dashing via the Ender Staff from Grappling Hook Mod.
15+ Augments (baubles) to give increased stats and extra abilities.
An in-game Music Player allowing you to create playlists from YouTube and Soundcloud, or shuffle the pre-selected songs.
A dynamic difficulty system where tougher and tougher creatures spawn as you progress.
A Quest Book which gives vital information as well as tidbits of worldbuilding and lore.
... and more!

Treat this as a murderous sandbox. Feel free to drop your own resource packs, shader packs, and maps into the modpack! Fight parasites in realistic cities, or cyberpunk cities, the possibilities are endless! (If you play on a custom map, it is recommended to disable the Random Respawn mod.)

The quest book has all of the information you will need to know. Just don't forget to select the check box whenever you create / enter your world to enable the parasites to spawn.