
Dungeon defenders is a combination of a tower defense and sort of an RPG. It is fairly easy to play if you have played this sort of genre before, if not it has a very good tutorial which explains everything really quick. The whole point of the game is to protect one or more crystals from the invading orcs, goblins, and other bigger monsters.
You can choose from 4 different types of heroes : Apprentice, Squire, Huntress and Monk. They are all different from each other and require different tactics. The apprentice relies on ranged attacks and can build magical towers and blockades. The Squire is a melee attacker and he is specialized in blockades, with many of them being very offensive and dealing damage to enemies when they come in contact with it. The huntress is ranged and can kill enemies from far away and is specialized in building a wide variety of traps. The monk can attack with melee weapon and with a ranged projectile, and he is specialized in building auras that can help the team or damage the enemy.
The game has a a lot of modes and maps. Each map has a difficulty setting that can be modified to whatever you desire, although a higher difficulty setting means that you will level up faster and the enemies will drop better items. When you level up you can choose to upgrade on your hero, or on the things he can build. If you upgrade your hero more, then you are more combat oriented, and in contrast if you upgrade the stuff you can build, you're more of a builder and defender.
The way a map is played is very simple. You first have the building stage where you can build your defenses, repair the existing ones and collect all the loot the enemies have dropped in the previous stage. The rounds get exponentially harder with a lot more enemies coming and with a higher diversity. At the beginning of each round you can see what types enemies you'll encounter as well as how many they will be. You can also switch between heroes while in the building phase of the round. This is helpful because you can really build a higher diversity of defenses on the battlefield and get to use every hero for maximum advantage.
The graphics have a cartoony feel to it, but the overall quality is high. It is also optimized very well with huge battles running smoothly and with no glitches.
The game also constantly gets updated and every now and then, new downloadable content appears bringing new challenges and keeping it fresh.
v7.1 [Dec 9, 2011]
7.16 Update Notes
* Added "Assault Mission Pack" premium content, free for owners of the 'Lost Eternia Shards Complete DLC'
* Added "Barbarian Hero Class" premium content
* Added "Hardcore Mythical Defender", "Dungeon Raider", and "Mythical Dungeon Raider" Accomplishments & Steam Achievements
* Added one-button "Sync All Items to DefenderStore.com", and no longer pops up Steam Overlay after you login to the site!
* Added 'Mythical Defender' reward! 'Outlander' costume with special ability
* Added Item-Box/Hero-Shop "Folder" support (& subfolders too), and Item Drag-&-Drop support
* Added "Q" key to toggle "Front View" mode where you can view the front of your character and rotate around them for tasty pics
* Added "H" key to Toggle HUD visibility
* Added UI Option to disable controller rumble feedback
* Made Hardcore mode available in all Difficulty settings
* Hardcore mission completions now save and are visible in your completion stats
* Fix for network bandwidth issue involving high-attack-rate projectile towers: tower projectiles are now locally spawned and locally-calculated client-side, completely elminating their bandwidth cost.
* Spider Webbing no longer stacks on players, you can only be webbed once-at-a-time
* 'Group Hug' Achievement can now optionally be earned using the corresponding Gender-Swapped Heroes
* Fixed bug where Squire's Blood Rage damage resistance calculation was inverted, erroneously making him take MORE damage as the Blood Rage stat was level updated. This is resolved, and now e.g. 1800 point Blood Rage will cut incoming damage by about 50%, enabling better Squire tanking especially on the high-end.
* Reduced Healing Ramp Cost by 20% (less Healing Cost per HP increase), and reduced Healing Cost by a straight 40% in NM
* Darkness Trap now strips mobs of elemental immunity, and reduced DU cost to 5
* Player Shop Maximum Item Sale Cost is now correctly 200,000,000 (the UI was previously erroneously limiting the number to 8 digits, preventing reaching this maximum)
* Fixed the cost of upgrading "Halloween Spooktacular!" items, now is the same as other equivalent items
* Fixed another kind of 'Return-To-Tavern-Crash' (perhaps the last)
* Buffed Squire Circular Slice damage ramp by 15%, Reduced its cooldown by 1 second, and increased its animation speed by 25%
* All Squire Towers HP buffed by 60% in NM, Harpoon Turret rotate speed increased by 40%
* Eliminated Speed Boosts in NM Assaults