* Actor can move
* Load Map
* Map Collision
* Actors can Shoot
* Actors can die
* NPC states
** Idle
** Purchasing
** Fighting
** Dead

* Part I: The Desert
** Follow Radar Instructions
** Kill Some Desert Snakes
** Enter the Bunker

* Part II: The Bunker
** Shoot at enemies
** Find and Activate Nuclear Weapons

* Part III: Enemies Waves
** Survive