Among the top Android games free for download lie a few select apps which would surely be worth the space in your SD memory card. One of these is Adventure Town. 

Developed by Supersolid, this real-time strategy/RPG game is fairly new to the Play Store, yet it has already surpassed a million installations. 

Getting inspiration from other popular games in this genre, Adventure Town sets you as a leader of a destroyed tribe due to monster attacks. Your mission is to build up your town and improve its offense, defense, market, in order to build a city. When the right time comes, you will be able to get heroes which you can level up and customize with skills to attack and defend your town. 

Unlike other games in this genre, Adventure Town does not require internet connection to be played. However, there is also an option to connect with friends via Facebook in order to track their accomplishments, and even duel them. 

And if you are the competitive type, there are world leaderboards where you can climb your way to stardom. 

Adventure Town is free to download from Google's Play Store with optional in-app purchases to unlock premium skills, items, etc.