R-CMD-check test-coverage Codecov test coverage

R Warrior

R Warrior is a game designed to teach the R language and artificial intelligence in a fun, interactive way.

You play as a warrior climbing a tall tower to reach the precious Hex at the top level. On each floor, you need to write an R function to instruct the warrior to battle enemies, rescue captives, and reach the stairs. You have some idea of what each floor contains, but you never know for certain what will happen. You must give the Warrior enough artificial intelligence up-front to find their own way.

For more information on the game, see my blog posts with the rwarrior tag.

This is a port of Ruby Warrior by Ryan Bates.

R Warrior Screenshot


# install.packages("devtools") # If devtools is not installed
devtools::install_github("trickytank/rwarrior", build_vignettes = TRUE)


Load the package:


Levels should be played in sequential order. So far, the beginner tower has been implemented with 9 levels.

To learn how to complete the first level, bring up the read me.


Use the information gained to write your AI and run play_beginner().

AI <- function(warrior, memory) {
      # Your code goes here, you can ignore memory for early levels
warrior_name <- "Fisher" # A name for your warrior
play_warrior(AI, warrior_name = warrior_name, level = 1)

More advanced levels require using the memory argument to the AI (or the use of a reference class). Return the memory object in your function and will pass it to the memory argument for the next call of your AI.

AI <- function(warrior, memory) {
      if(is.null(memory)) {
        # give initial values when memory is NULL
        memory <- list(variable1 = "initial value") 
      # Your code goes here #
      # Access memory variable1 with memory$variable1
      # The AI result should be the memory

You may want to modify the sleep option to play_warrior() to change the time between updates in seconds. Set to “prompt” to instead update on pressing the return key.


Your objective is to not only reach the stairs but to get the highest score you can. There are many ways you can earn points on a level.

Don’t be too concerned about scoring perfectly in the beginning. After you reach the top of the tower, you will be able to re-run the tower and fine-tune your Warrior to get the highest score. See the Epic Mode below for details.

Epic Mode

Once you have completed the beginner levels, it is time to take on all the levels with one AI in epic mode! Optimize your AI to get S rank in all the levels of the tower.


Leader board

Submit your best AI to the R Warrior Leader Board.

Future directions