Towers

Towers are any kind of structure a player creates and uses to destroy Robos in Robo Defense.

Overview
Towers are placed by players to stop those evil Robos from crossing the map. Towers can be bought, placed, upgraded, and sold by players.

Classes
There are 20 kinds of Towers a player may create/upgrade, they're seperated by their attack capabilities:

Ground-Ground (Only)

 * Mortars
 * Artillery
 * Flame Towers
 * Inferno Towers

Machine Guns

 * Light Guns
 * Medium Guns
 * Heavy Guns

Rocket Launchers

 * Light Rocket Launchers
 * Medium Rocket Launchers
 * Heavy Rocket Launchers

Slow Towers

 * Basic Slow Towers
 * Upgraded Slow Towers
 * Advanced Slow Towers

Miscellaneous

 * Teleport Towers

Special Cases

 * Mine Towers
 * Flare Towers

Ground-Air (Only)

 * Light Antiair Cannons
 * Heavy Antiair Cannons
 * Surface to Air Missiles
 * Advanced Air Missles

Buying/Creating
Towers can be bought/created for some $$.

Selling
Towers can be sold for $$ or for complex strategic purposes.

Reward Points
Reward Points you earn can be used to purchase upgrades for your Towers. Upgraded Towers are better Towers.

In-Game
Towers can be upgraded to a higher level or be changed to another tier (while still a level one tower) for $$.