GemCraft is a tower defense

Tower defense

Tower defense is a subgenre of real-time strategy computer games.The goal of tower defense games is to try to stop enemies from crossing a map by building towers which shoot at them as they pass. Enemies and towers usually have varied abilities, costs, and ability costs...

 flash game created by Game In A Bottle. Originally released June 26, 2008, a prequel, GemCraft Chapter 0: Gem of Eternity, was released April 16, 2009, and a sequel, GemCraft lost chapter: Labyrinth, was released February 17, 2011. The original was released for iOS on April 14, 2011 by NTT Resonant.

In GemCraft , players are given gems

Gemstone

A gemstone or gem is a piece of mineral, which, in cut and polished form, is used to make jewelry or other adornments...

 and may combine them to put in towers. Different combinations of gems produce different effects, such as splash damage

Splash damage

Splash damage, also known as radius damage, is a term used in several types of games, most notably in first-person shooter and real-time strategy computer games, to refer to damage taken by players or objects in the area surrounding a point of weapon impact...

, Damage over time and triple damage

Critical hit

In many role-playing games and video games, a critical hit is a successful attack that deals more damage than a normal blow.-Origin:The 1975 role-playing game Empire of the Petal Throne introduced the concept of critical hits...

. The player's life bar and magic energy are represented by the same statistic - mana

Mana

Mana is an indigenous Pacific islander concept of an impersonal force or quality that resides in people, animals, and inanimate objects. The word is a cognate in many Oceanic languages, including Melanesian, Polynesian, and Micronesian....

. With mana, the player can purchase towers, gems, trenches, traps, and combine gems. A key aspect of strategy in GemCraft is to increase the player's mana gain to high levels, enabling creation of the strongest gems. Combining two gems creates a single gem of higher power, or 'level'. The gems change with level. In GemCraft Chapter Zero, level 1 gems are represented by a triangle, Level 2 are squares, and so on until level 6; all gems after that also become circular cut gems.

Chapter 1: The Forgotten

GemCraft: The Forgotten original game was a very simple game, with 8 different gems, each with a different ability. The gems' colors and abilities are:

Gem Color	Effect - Explanation
Red	Splash - Damage Splashes a certain radius from the explosion (other effects do not splash).
Orange	Mana Gain - The player gains a certain amount of mana per hit, depending on certain factors.
Yellow	Triple Damage - There is a chance that each hit will deal x3 damage
Lime	Chain Hit - There is up to a 40% chance that each hit (including chained hits) will hit another monster.
Green	Poison - Deals a certain amount of damage over 5 seconds. Poison effects are stackable.
Cyan	Shock - The object is paralyzed for up to 1 second. This has up to a 14% chance of occurring.
Blue	Slow - The enemy monsters slow down a certain amount depending on the level.
Purple	Armor Reduce - there is up to a 70% chance that the monsters armor level will be reduced by 1.

Grade 1 gems are triangle, Grade 2 gems are square, Grade 3 gems are diamond shaped, Grade 4 gems are pentagons Grade 5 gems are hexagon, Grade 6+ gems are circle.

Along with using them in either given or built towers, players can combine gems to create either pure gems with very strong specials, dual gems with weakened specials but higher damage, range, and speed values, or even more, although the benefits past dual gems are negligible. Another possibility with gems is to use them as gem bombs, which are free to cast, and vary in power depending on the level of the gem. The player can drop them on monsters to damage and kill them instead of using them in towers. This is useful if the player does not have enough mana to banish (survive the assault) the monster.

Trenches are used like slow gems, except they are placed on the path, usually around the player's towers, and cannot fire at enemies. They slow down all enemies that pass though them, giving the player's towers more time to shoot at them. These are very useful against Epic Bosses, (what is traditionally referred to as simply bosses, but since there are boss monsters throughout the levels, this is the name for the larger variations.) which have masses of HP (some over 50,000), and are hard to take down without much help.

There were also 12 skills a player could invest in. The player earns 4 skill points upon leveling up, and these may be used to obtain unlocked skills. These skills ranged from lowering the amount of mana paid to purchase things, to increasing the potency of gems, giving the player random gems to start levels out with, etc. Some skills cost more points than others, but were more powerful and worth the extra cost.

There were also hidden levels that the player can unlock by getting a glowing rank, which was obtained by earning a set score on each level, on 6 linked levels, including epic boss battles (the last two levels do not count toward hidden levels). There were 8 of these levels, each allowing the player use of only 1 type of gem, as opposed to other levels which allowed use of 2 to 8 gems. These levels unlocked an amulet, GemCraft's version of an achievement, and counted toward the total score and gave XP. Other than that, however, these levels were just a challenge.

Chapter 0: Gem of Eternity

GemCraft Chapter Zero: Gem of Eternity was released on April 16, 2009. The game was redesigned: Trenches were cut, and replaced with traps, in which the player placed a gem of any level and color, and the gem dealt 1/5 of the damage it would have in a tower, but fired twice as quickly and its specials were doubled as well. The skill sets were redesigned for a more customizable experience, with each gem color having a skill, in addition to dual and pure gem mastery. The game also introduced the prismatic gem, which is made up of all 8 colors. It has a mastery. All skills were returned in some shape or form, with trap skills replacing the trench ones. Many skills were expanded into multiple skills. Monster beacons, which block the player or aid the monsters, and spell shrines, which aid the player when a gem is dropped on them, were also added.

The basics returned. The game remained a tower defense game, and the goal was still to protect the player's wizard tower (the game's equivalent of a base) from waves of monsters

Tower defense

Tower defense is a subgenre of real-time strategy computer games.The goal of tower defense games is to try to stop enemies from crossing a map by building towers which shoot at them as they pass. Enemies and towers usually have varied abilities, costs, and ability costs...

. The colors and effects remained the same, and the only skill to be completely overhauled was build a trench, which was replaced with build a trap.

All levels except for the arcane boss battles (which replaced epic battles), not to be confused with arcane battles, had 10 ways to play them. Each could be played in each mode to gain XP

Experience point

An experience point is a unit of measurement used in many role-playing games and role-playing video games to quantify a player character's progression through the game...

, and each level had 3 of the 8 eligible modes (the default was ineligible, and the hidden 10th mode was also ineligible) gave triple XP. Amulet XP was tripled on those as well (except for Victory and Journey amulets) These were the 9 modes given:

Game Mode	Specifications
Normal	Survive the level by killing monsters without complete loss of life.
Sudden Death	Kill all the monsters without one reaching the wizard tower.
Endurance	Survive for as long as you can.
Heroic	2 extra waves than normal, with 20% more monsters, having 40% more HP. No giant monsters.
Swarm	Only swarm monsters with 60% more monsters.
Time Siege	Complete in a specified amount of time.
Bleeding Edge	60% more monsters, with 80% more HP. No Giant monster. 4 additional waves.
Carapace	Armored monsters only, with twice as many monsters, and each with more armor but decreased speed, plus 6 additional waves.
Arcane	80% more monsters, with twice as much HP, plus an arcane guardian and 8 additional waves. No giants.
Beyond Corruption	6 grade 5 gems (hexagons) given at start. 2x monsters, with 150% HP. 10 additional waves, and 2 more added each time completed. No giant monsters.

GemCraft Labyrinth

GemCraft lost chapter: Labyrinth, has basic game mechanics that are roughly the same as in the original GemCraft, though many new features have been added. The Labyrinth chapter in the series is the largest yet, with 169 separate maps available for play in a mazelike 13x13 grid with the player starting at one of the edges and moving through the maze to eventually "complete" the game at the center. When a player first completes any one map, zero to three adjoining maps will be made available to play. There are many changes to the game's structure although the basic tower-defense premise remains the same. Some changes are described below.

• The gem creation interface has been altered to allow the player to first select the color of gem to create, then select the grade to create-up to grade 12 may be created from this interface.
• A gem may be copied for the same cost as it took to create it in the first place, or recycled to obtain 70% of the mana back.
• Leveling is now based on experience, which is awarded based on a set value for each map based on its challenge, and increased by various multipliers that the player either selects or earns through their in-game performance on each map.
• Players earn skill points primarily by leveling up, but also by defeating special rare monsters called "apparitions" and completing certain achievements. Skill points are applied to various skills that increase the player's strength, with new skills unlocked as the player's level climbs. Higher skill levels cost more skill points, so players can and should juggle them to best support their approach to defeating each map before the mission starts.
• Prior to each level, players have the option to select various modifiers to the basic map, including higher monster counts, increased number of waves, whether monsters are armoured only, waves are more varied (swarm, armor, fast), and others. Each setting increases the overall experience multiplier that the player receives on the wave's successful completion, depending on the level of challenge it introduces. Players can change settings to substantially increase the challenge level for the easier initial maps
• Players also receive bonus experience multipliers for various milestones that they complete within each map. Bonuses are awarded for exceeding a number of built towers, number of monsters that are summoned through gem-bombing, successfully preventing all monsters from reaching the player's tower (which is now an orb), and a number of other accomplishments.
• Shrines have been revised to slowly charge up over time, and can be built by the player where and when desired, albeit for a significant price.
• Players can pay an additional mana fee to unlock other gem types on specific maps. Most maps initially allow up to two gem types to be created out of the eight types.
• Gem towers can now attack monster lairs and beacons to destroy them. Note that monsters can come in from the edges of the map and can travel through nests regardless of whether the nest is destroyed or not.
• The Red gem type (named "Bloodbound") now gives extra damage based on the total number of kills it has obtained. A single, consistently upgraded red gem can become extremely powerful with very high damage towards the end of a level.
• A new "amplifier" structure adds additional damage and other effects to the towers and traps that it is placed next to. The amplifier provides damage and increased special effects to its neighbouring structures based on the gem type and strength that is placed within it, though it becomes weaker if it is applied to more and more gems.
• A new "wall" building type substantially changes the strategy for some maps. Players can use the wall structure to force monsters to approach their tower along one selected path. A wall (or tower) can be built anywhere, including on the path that the monsters follow, provided it does not block that path in its entirety. This creates a brand new strategy element to the game where players can lay series of wall structures to force monsters to approach their tower along a path that they design. Some maps have multiple paths that monsters can follow, and others are completely wide-open with the monsters able to initially travel anywhere and the player must constrain their movement by building groups of walls that lengthen their journey.
• Certain maps come with "mana shards", essentially crystals with a finite store of mana that are embedded in the ground and that can be attacked by neighbouring towers to yield their mana.
• The new version comes with purchasable Premium content, including more powerful late-game skills, and additional options and gameplay modes to make maps more challenging. Purchasing the premium options is not required to reach the game's highest levels at their basic settings, but will make certain maps easier and is necessary to unlock the more advanced challenge modes.
• Certain maps come with "tomb" structures that when destroyed release a variety of high-powered monsters for an additional level of challenge, and a multiplier boost.
• Some maps come with challenges that are very difficult to complete until the player is extremely high level or has purchased premium content.

Chapter 2: Chasing Shadows

On August 1, 2011 Game In A Bottle announced the beginning of the development on the next part of GemCraft. which will be named "GemCraft Chapter Two: Chasing Shadows". As for now the release date is unknown, because of the little time passed since the announcement.

The Forgotten

Gamezebo

Gamezebo

Gamezebo is a website that focuses on editorial coverage of the casual games industry, offering interviews, features, reviews, previews, strategy guides, news and podcasts....

 gave the original GemCraft game a rating of 3.5/5. Slide to Play rated the game 2/4, stating that it doesn't have a unique twist to set it apart from other flash games.

Labyrinth

As demonstrated by fan reactions to initial delays in the release of GemCraft Labyrinth, it was a much anticipated sequel to the series. As of June 2011, Labyrinth garnered a rating of 4.8/5.0 from 156 votes cast at Casual Gameplay.

External links

• GemCraft Chapter 0 on Kongregate
• Game in a Bottle
• GemCraft on towerdefence.it