Welcome to Complexium,This is an extremely hard survival mode mod pack for minecraft. There is some rpg involved because of the Minecraft Comes Alive (MCA), all I can say as a hint is get yourself sealed off in some way possible and light up the area because Mobs are dangerous I would say find high ground but a hole in a side of the hill/mountain should suffice, and if that is not enough you have to take care of hunger, thirst and stay warm, additionally you have only 5 lives and each time you die it gets less and less!
No worries if you die a few times at 0 health it will force you into spectator mode for 300 seconds in which you can use that to your advantage and look around the area for places you might want to get to so you can advance! Oh I almost forgot you also cant eat more than 6 pieces of any food as it gives you diminishing returns from that point on! But no worries I have a food mod in it that gives you like 1200 food items to get!
You will spawn in a temple but trust me on this one it won't last as mobs will break into the structure as soon as night comes, if you want a true fortress you will have to find or craft very strong blocks! It is a very complex gameplay thus you will have to conform to the game and do what you must do to survive and advance! If I remember correctly there is some pixelmon and some inventory pets so yes you can actually have battle companions! In MCA you can craft your Married Partner Armor and Weapons so they along with your pets can help aid the fight,
There is Bloodmoon and Vampires in game as well as you can be a Vampire! There are tons more mods but really you can do alot in game and once you actually become stable then you can make Furniture that is actually Furniture to make your place look nice! All I can say at this point is good luck and I mean it! Well there are chance cubes so maybe you can make something happen that way but anyways I am done chatting your head off enjoy playing :)
Special Thanks To The Following Mod Pack Owners Who Wanted Their Mod Pack Listed For Me To Use Their Permission:
Better Survival Mod by mujmajnkraft
Better FPS by Guichaguri https://minecraft.curseforge.com/projects/betterfps
Epic Siege Mod by Funwayguy
Just Another Rotten Flesh To Leather Mod https://minecraft.curseforge.com/projects/just-another-rotten-flesh-to-leather-mod
Lycanites Mobs by Lycanite https://minecraft.curseforge.com/projects/Lycanites-Mobs
Minecraft Comes Alive (MCA) by Wildbamaboy https://minecraft.curseforge.com/projects/minecraft-comes-alive-MCA
Nature's Compass https://minecraft.curseforge.com/projects/natures-compass
Pam's Mods by MatrexsVigil otherwise known as Pamela Collins, Painterly Pack, and Rhodox
Tough As Nails https://minecraft.curseforge.com/projects/Tough-As-Nails