1. Art
   1. Steam Punk
   2. Future-esque Alien Invasion
   3. 70's Spy fashion
2. Story and Art
   1. Justification
      1. Alien Invasion (defend Earth)
      2. Sporting Event
   2. Plots
      1. Steam Punk
      2. Evil Genious
      3. Alien Invasion
3. Game Style
   1. Survival
   2. Tower Defence
4. Level Design
   1. Map Layout
      1. TF2 Arena
      2. L4D reach goal
      3. L4D Survival
   2. Wave Style
      1. Limited
      2. Infinite (linear)
5. Monster Spawn
   1. Specific Spawn Point
   2. Hidden from Player
6. XP/Cash
   1. Improvables
      1. Player Improvements
         1. passive abilities
      2. Weapons Improvements
         1. improve particular weapon, upgrade is bound to weapon
      3. Shelter Improvements
         1. Linear Improvements
            1. Lvl 0 to Lvl ...
         2. Attack Upgrade
            1. additional range through tesla balls
         3. Repair costs cash
   2. ideas
      1. Earned at End of Round based on Round performance
      2. Per player
      3. transferable cash
      4. non-transferable skills
      5. in game multiplier (eg. 10 headshots in a row)
7. Shop Design
   1. Weapons
      1. No initial weapons
   2. Skills
      1. Opens in Level 2, to ensure a weapong is bought
8. Death Revival
   1. Revival has a Cost
      1. % of cash spent on Skills and Weapon Upgrades
   2. Revival state?
      1. HP?
      2. Weapons?
      3. XP/Cash?
9. Gear
   1. Weapons
      1. Non-class specific
      2. Weighs player down
      3. individual weapon loadouts can only be switched between waves
      4. non-droppable
         1. shelters refill ammo
      5. 3 Types; Primary, Secondary, Throwable
   2. Armour
      1. only aura-like visual effect
      2. increases HP
      3. increases damage resistance