Art  Lind

Art Lind


Are the space invaders deterministic or stochastic?


Google Deepmind achieved human-level performance on 49 Atari games using the Arcade Learning Environment (ALE). This article describes the methods I used to reproduce this performance and discusses the efficiency of the mechanisms used by Deepmind and Open AI for injecting stochasticity in the ALE.


As a side project, I spent some time trying to achieve the same Deepmind’s human-level performance on Breakout and Space Invaders. Although I understand there are many better performing architectures, my goal was to use the same network as the one presented in Deepmind’s 2015 nature paper (Human-level control through deep reinforcement learning). I did this to better understand the challenges and performances Deepmind experienced while playing some iconic games from my childhood. One of the challenges Deepmind experienced is particularly interesting to me: Are the environments stochastic or deterministic? Did Deepmind and Open AI fight deterministic waves of Space Invaders? In this paper we discuss the efficiency of the mechanisms used by Deepmind and Open AI for injecting stochasticity in the ALE.

The source code can be accessed at

This repository contains the code I used to support my conclusions as well as the data of my tensorboard runs to encourage discussions and facilitate comparisons.

Additionally, for readers who want to learn how my algorithm works, I published Breakout explained and e-greedy and softmax explained. These are two Google Colab notebooks where I explain expected sarsa and the implementation of the two policies, e-greedy and softmax.

#openai-gym #tensorflow #atari #reinforcement-learning #machine-learning

What is GEEK

Buddha Community

Are the space invaders deterministic or stochastic?

Work Nomic


Worknomic - Best Office Space for Rent/Leased in Sector 63 Noida

At Worknomic coworking space, we provide the basic amenities like high-speed internet, a cafeteria, opera-terrace gym, meeting rooms, seminar and event rooms, storage space, thinking pods, and many more. We provide access to coworkers so they can customize their spacer as per their choice and requirements.

#best coworking space in noida #best leased space in noida #coworking space for the freelancers in noida #best coworking space in noida #worknomic

Space Science with Python - Space Maps

In our last tutorials we computed the position and velocity vectors of different celestial objects. We determined the apparent angular distance between objects (so called phase-angle) and worked on some small projects using Python and the NASA library SPICE (using the SPICE wrapper spiceypy).

#space-science-with-python #science #space #programming #pyhton

Kole  Haag

Kole Haag


Writing Space Invaders with Go

The earliest memory I had of arcade video games was watching my older brother and cousins going at the video game machines at Genting Highlands. While our parents were at the other types of games Genting Highlands was more popularly known for, we were generally let loose to play arcade games to our hearts’ content.
Those were the magical days of Pac-Man, Space Invaders, Galaxian, Donkey Kong, Frogger, Centipede and many, many more. Days of blinking lights, intense music, frantic tugs at the joystick, furious mashing of the buttons then the groans of dismay as the last life was lost.

As with many aspiring programmers starting out, one of my secret dreams was always to recreate that magic, to write the next big game. And as with many as well programmers, I failed many times miserably. Even though eventually I succeeded in writing some simple games, I came to realise that even seemingly simple games are in fact not easy to write.

Of course, that didn’t stop me from trying my hand at it once again. This time around I tried the grand old dame of arcade video games — Space Invaders.

#go #golang #game-development #space-invaders

Space Invaders In Python With Source Code

Please scroll down and click on the download button to download the Space Invaders In Python With Source Code for free

The Space Invaders project is a simple project in Python. This game is a simple shooting the spaceship game. In this game, the player has to use arrow keys for moving his/her shooting gun and shoot it with the help of the spacebar. There is a simple and clean GUI for easy gameplay. Here, the player has to use the arrow keys to move the gun for aiming the spaceship. The game is an interesting game.

About System

The project file contains python scripts ( Talking about the gameplay, the player has to shoot the spaceship from the moving gun. The player must click on the spacebar to kill the spaceship. The player has to shoot and destroy all the zigzag moving spaceship to win the game. If the user cannot destroy all the spaceship before it touches the ground, then he/she loses. The PC controls of this game are also simple. You can use your left and right arrow keys for gun movement and spacebar for shooting. The gameplay design is so simple that the user won’t find it difficult to use and understand.

#pygame #python projects #source code #space invaders #python

GreenHub Singapore - A Conducive & Green Office Rental Space

There are many office spaces for rent in Singapore, but few are as affordable and flexible as GreenHub Singapore.

#office spaces #office spaces for rent #office spaces for rent in singapore