It's a vastly different story on iOS, of course, where that platform is over-saturated with examples of tower defence games, and indeed, which has served as something of an evolution chamber for it, with various features like hero units and
upgradeable towers added over the years to the basic «plant down some towers to defend against waves of enemies» template.
Just like any other tower defense game you have your map and a selection of
upgradeable towers to use in your attempts to defend yourself against your enemies.
On the defense you will have 24 different
upgradeable towers and on the offense you will have 24 different units to lead the charge.
OTTTD is from the modern branch of the tower defense genre that believes the player should constantly be occupied with busywork (something I'm not personally a fan of), and with that in mind, you get the full smorgasbord of clickables: controllable heroes (each of which has their own skill tree and equipment loadout),
upgradeable towers (each of which can also be converted to one of two advanced types), and various cooldown - powered hero abilities.
Fieldrunners [iPhone / iPod Touch] Subatomic Studios, LLC http://www.fieldrunners.com Defend and control the field using a diverse selection of
upgradeable towers in a limitless adventure, using a wide array of tactics and strategies against countless waves of unique land and air combatants!
It plays more like a standard tower defense game, with
upgradeable towers and enemies attacking your base in a straight line.
Defend your base and control the field using a diverse selection of
upgradeable towers in an epic adventure.
Not exact matches
There are 8 basic varieties of
towers to strategically use and each has up to six
upgradeable levels.
And on top of all that, there are pets: unique and
upgradeable familiars that follow you and assist you in your quest, either by attacking enemies, healing you, repairing your
towers, granting you extra mana, or more!
Best choice for tablets and hi - end mobile devices.General features: • frantic endless
tower defense • 5 locations • 63 levels • 3 difficulties • 35 achievements • fully destroyable environments •
upgradeable moonstones •...
General features: • frantic endless
tower defense • 5 locations • 63 levels • 3 difficulties • 35 achievements • fully destroyable environments •
upgradeable moonstones • multiplayer co-op feature • trendy ambient music
As probably anyone could have predicted, an upgrade of a
tower defense game means that
upgradeable units are mandatory.