The pack is a part of Mech Constructor series, and can be expanded by

The Light and Meduim Mechs, The Spiders and Tanks, The Humanoid Robots,

and other assets. The textures match, and the parts are intechangeable.

The pack contains over 70 prefabs of different modules, that will allow you to create numerous combinations of turrets and towers.

The buildings are extremely easy to assemble - just drop the parts into the corresponding containers and they'll snap right into place.

The poly count of units varies from 500 to 3000 tris.

The textures work well with HDRP and URP (including Unlit) shaders.

Just convert the existing Built-in materials through the Edit menu,

and you're good to go. Tested in Unity 6.

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Parts:

• Worker drone (animated)
• Fighter drone (animated)
• Turret bases (7 levels)
• Tower bases (5 levels)
• Tower walls (2 types)
• Roofs (3 levels)
• 8 cockpits
• 5 shoulder parts
• 9 "Halfshoulder" parts
• 9 back parts
• Big mortars (3 levels)
• Big 2-barrel cannons (3 levels)
• Big rayguns (3 levels)
• Radars (3 levels)
• Plasma guns (3 levels)
• Rocket launchers (3 levels)
• Rockets, cannon shells
• Landmines (3 levels)

Drone Animations:

• Pack, Unpack
• Idle, Move (no Root Motion)
• Hit, Death
• Repair, Punch, Pick up, Carry (Worker)
• Shoot (Fighter)

Textures:

• Hand-painted Albedo (7 color variations, works well with unlit shader)
• Realistic Albedo (6 color variations)
• Normal Map
• Metallic/Smoothness
• Emission
• Mask Map for HDRP
• Color ID along with grayscale Albedo

All the parts in the package share one tightly packed 4k texture altas.

There's a room for downsizing it - the Sketchfab previews

are with 2k textures.