1.0.0 First Release
Added:
Mobs:
    Guardian Stalkers
    Guardian Skywatchers
    Guardian Turrets
    Guardian Scouts
    Decayed Guardians
    Mini Guards
    Guardian Forges (Mob)
    Guardian Chests

Blocks:
    Guardian Forge (block)
    Ancient Reactor

Items:
    Ancient Helm
    Ancient Chestplate
    Ancient Leggings
    Ancient Boots
    Ancient Blade
    Ancient Axe
    Ancient Spear
    Guardian Stalker Placer
    Guardian Skywatcher Placer
    Guardian Turret Placer
    Guardian Scout Placers
    Ancient Gear
    Large Ancient Gear
    Ancient Core
    Guardian Eye
    Beam Charge

Structures
    Guardian Camp Ruins
    Small Colosseum Ruins
    Large Colosseum Ruins

1.0.1 Bug Patch

Changes:
    Removed Guardian Scout's ability to sit. (This interfered with opening its inventory)
    Fixed Guardian Scout's attacking
    Fixed generation of ruins
    Made ruins less common