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Kingdom Rush 6: Genesis TD is a fantasy tower defense game from Ironhide Games. You travel back in time to save Linirea, placing and upgrading defensive towers, commanding heroes and holding the line against waves of fantasy enemies. The game offers tower defense strategy with more than 50 achievements, harder game modes and hidden Easter eggs. It can be played offline, needs Android 6.0 or later, and runs best with at least 1 GB of RAM and 1 GB of free storage.

Forge Master is a crafting and combat game where you shape weapons across different eras and build stronger gear as you advance. You combine materials, improve your anvil and create equipment that boosts your character's strength in battles, with clans and short battles along the way. You can progress through regular play, though premium items can speed things up. Most features need an internet connection, so offline play is limited.

Elvenar by InnoGames is a free fantasy city-building strategy game for Android. Choose Elves or Humans, build and grow your city, research technologies, produce and trade goods, scout provinces, and join a Fellowship. Your progress carries over to the PC browser version too.

War Inc: Rising is a free tower defense and strategy game: build your base, recruit heroes with unique abilities, and battle in co-op and PvP modes. By Fastone Games, on Android.

Nightfall: Kingdom Frontier TD is a tactical tower defense game set in a medieval world, where you build defenses, manage resources, and battle to defend the frontier of a cursed kingdom. It blends strategy, tower defense, and RPG elements as you grow into a legendary knight. It requires Android 7.0 or higher.

Siege Arena: Build & Fight is a merge battle game from VOODOO. Build a village, place buildings that summon melee, ranged, mounted and siege units, merge buildings to make them stronger, and fight 1v1 battles against rival factions. Free to play, and it can be played offline.