Screeps: Arena is a programming-focused RTS. Literally: you don’t control anything once the match starts, you just hope that the orders you planned in advance are good enough.
Then your units are thrown into battle against others in quick 1v1 matches. These matches take place in a variety of arenas with different rules, each with their own matchmaking and rating, and you will need separate sets of orders for each arena. New arenas are introduced each season of Screeps, and you’ll refine your code for these new arenas and refine it again between matches to improve.
You can find Screeps: Arena on Steam or learn more on its official website, screeps.com.