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This modpack is a moderate-weight pack based around the Prehistoric Nature and Fossils and Archeology Revival mods, with science and tech from Immersive Engineering and others, all set in a kind of post-apocalyptic overworld with dungeons, mobs and fun stuff. Mine for ores and metals, find fossils, extract the fossil contents and build portals to ancient dimensions where you can find prehistoric life. A whole suite of Immersive Engineering-based mods support energy extraction and automation for building. We also have a chemistry mod for breaking down and recombining chemicals for all your needs and Tinkers Construction for putting those to some use, with various armours and addons for Tinkers. Fossils machinery requires RF energy input to work - available via Immersive Engineering. The Nether and End have been modded, and you can visit a Labyrinth and the Aether.

Use these JVM arguments for best experience:

-Xmx6G -Xms4G -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseNUMA -XX:+CMSParallelRemarkEnabled -XX:MaxTenuringThreshold=15 -XX:MaxGCPauseMillis=30 -XX:GCPauseIntervalMillis=150 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:+UseBiasedLocking -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -Dfml.ignorePatchDiscrepancies=true -Dfml.ignoreInvalidMinecraftCertificates=true -XX:+UseFastAccessorMethods -XX:+UseCompressedOops -XX:+OptimizeStringConcat -XX:+AggressiveOpts -XX:ReservedCodeCacheSize=2048m -XX:+UseCodeCacheFlushing -XX:SoftRefLRUPolicyMSPerMB=10000 -XX:ParallelGCThreads=2

If you are looking for a much more basic pack, try out the modpacks Purely Prehistoric Nature or Prehistoric Nature Integrated. Or for another fairly complex one along similar lines to this one, perhaps you may like Mythos.

Do you want to your own server to play this, or any other mods with friends? Drop my promotional code aechtrob into your order and pick up a cool 25% off with the wonderful Bisect Hosting by clicking on the image:

Chronos

Aether Continuation

Aether: Lost Content Addon

Alchemistry

AlchemyLib

Alfheim Lighting Engine

B.A.S.E

Beast Slayer

Biome Specific Dungeons

Block Drops (JEI Addon)

Bookshelf

Born in a Barn

BurnBabyBurn

Chisel

ConnectedTexturesMod

Construct's Armory

Corail Tombstone

CraftTweaker

CyclopsTek

Daedalus' Labyrinth

Default World Generator (port)