Gem TD

Gem TD is a tower defense map that originated from Warcraft 3. It features a unique maze, a challenging difficulty curve and a high degree of replayability. Build your gems and stones to protect the castle. 40+ waves of enemies will attack your castle.

Gameplay
At the start of each round, each player must place five gems using their hero's Build ability. Once 5 gems have been placed each player must decide which gem to keep by selecting one of their five gems and using one of the following abilities.
 * SELECT (Check) Keep the selected gem only.
 * MERGE (^) Replace the selected gem with the same type one level higher.
 * MERGE (^^) Replace the selected gem with the same type two levels higher.
 * COMBINE (Tower) Build a tower using the selected gem and other gems placed by the player during this turn.
 * DOWNGRADE (Hammer) Replace the selected gem with the same type at a lower level. (level is chosen at random)

During each round, each player can control their gems and towers to issue Attack and Stop commands or to use the COMBINE ability which will replace the selected gem with a tower built from any players gems on the map. (Gems are consumed in the order in which they were placed).

Gems
Gems come in various types and have a level 1-6.