you start in a bunker with a computer you will need to look up how to use open computers its complicated the floppy disks will roughly tell you what happened you have a hazmat suit a gun bullets drills chain saws food water and meds survive under ground or take the risk of going to the surface
mods needed

• Just Enough Items (JEI) (by mezz)
• Moving Elevators (by SuperMartijn642)
• MalisisDoors (by Ordinastie)
• CodeChicken Lib 1.8.+ (by covers1624)
• Quark Oddities (by Vazkii)
• SecretRoomsMod (by AbrarSyed)
• The Lost Cities (by McJty)
• HBM Fixes (by ZeithComms)
• MalisisSwitches (by Ordinastie)
• MalisisCore (by Ordinastie)
• Hbm's Nuclear Tech - Alcater Edition (by Alcater_curse)
• CB Multipart (by covers1624)
• SuperMartijn642's Config Lib (by SuperMartijn642)
• AutoRegLib (by Vazkii)
• Wireless Redstone CBE (by covers1624)
• Potatoo's Custom Structure For HBM's Nuclear Tech Mod (by potatoocake)
• OpenComputers (by Sangar_)
• Hammer Lib (by Zeitheron)
• WorldEdit (by sk89q)
• OpenBlocks Elevator (by vsngarcia)
• Quark (by Vazkii)
• Security Craft (by Geforce132)
• MalisisBlocks (by Ordinastie)
• SuperMartijn642's Core Lib (by SuperMartijn642)