A mod pack with mods like biomes Oplenty that change the users experience while exploring, and tech mods Like Mekanism which gives you the option to automate many things.
You can explore different biomes build an Automation empire with great storage thrue Applied Energistics2 and Storage Drawers.
It supports Multiplayers through Essential so you and your friends can play together.
its like better Minecraft but with less mods and Multiplayer so even when you have a lower spec PC/Laptop you get the most out of the pack.

