Here is a collection - 120 Battle Game Backgrounds

Features:

- HD Resolution (1920x1080px)

- PNG format

List of backgrounds:

Forest

Caves

Lands

Winter

Castles

Coast

Bridges 

Arenas

Mountain

Dungeon

Floating island

Streets

Ruins

Factory

...

Great for tactical GAMES. Examples are turn-based battles, idle battles, rpg clickers, etc.