TragicMC

This mod adds:

• Over 40 new mobs/bosses
• Over 100 new items/blocks
• Around 10 new enchantments
• Around 5 new potion effects
• Over 50 achievements to strive for

This mod will be especially fun for people who want more challenge out of minecraft survival.

There is a 2.0 version of the mod but it is available only for 1.7.10 and 1.8.9. It is an immense improvement over this one and I highly recommend trying it if you liked this version. It can be found here. The 3.0 version for 1.10.2 and 1.12.2 is even BETTER and can be found here.