Decimation is a Minecraft 1.7.10 - Forge Mod. You can get the required version of Forge from here.
Welcome to Decimation, Welcome to Hell..
Decimation is a scary, realistic and open-world zombie survival Mod, in which players (or Survivors) have one task: Survive in this zombie-ridden world for as long as possible! Over time, players will experience powerful moments and events whilst emerging in this mods gameplay. You will make friends and foe, join as a team or betray your squad over greed. Every descision made in Decimation counts towards your survival.