docs(corewar): add general introduction

subjects/corewar/README.md

@@ -1,3 +1,51 @@
-## Corewar
+## Core War
 
-### A bit of history
+### Introduction
+
+Back in 1984 D. G. Jones had the brilliant idea to create a programming game
+inspired by how some viruses manage to take over a system and their internal
+memory.
+
+From the very start the game was a great success and a flourishing community
+added new features and organized tournaments worldwide.
+
+In this project we will recreate the necessary tools to run a modified version
+of the game.
+
+### Game dynamics
+
+At its very base the game consists on having two or more programs (written
+by the contestants) that will be executed by the Virtual Machine in an arena (a
+sandbox memory space).
+
+We will call those programs the "players" from now on since they will be the ones
+playing, while their creators won't have any possibility to interact with them
+or the arena during the match.
+
+The player will have a limited set of instructions it could use to change the
+state of the arena.
+It can use those instructions to try and corrupt the opponent's memory space,
+replicate itself or repair damages made by the enemies.
+
+The winner will be the last player notifying the arena it was alive before the
+game ends.
+
+#### Structure of the game
+
+<!-- About CPU abstraction and toolchain -->
+
+#### End game
+
+### The Assembler
+
+### The Virtual Machine
+
+### Resources
+
+#### Instruction Set
+
+#### Config file
+
+#### A basic player
+
+#### Testing environment