Hidden Dimensions 3 (or HD3 for short) is a science-fiction themed collectible cards game offering over 500 cards and varied gameplay modes and challenges.

Control a powerful baseship capable of launching ships, deploying structures and performing actions. The structures provide various support roles and are the backbone of your fleet, generating energy required to launch larger ships. Ships serve to both defend your base against the fleet of your opponent, and to attack the opposing baseship.

Features
* more than 500 cards to collect
* duel against the AI, and control the difficulty and gameplay rules in great detail
* build your own decks, or let the game create them for you
* complete in challenging events
* a customizable flagship to lead your fleet into battle
* combat boosts that provide varied benefits during battle
* countless mercenaries that can assist you in duelling your opponents
* major gameplay modes : unpredictable, mercenary bosses, tactical decks, exploration

Clients exist for mac, linux and android, but these are still considered to be in alpha stages, even though they have the same content as the windows clients, due to possible operating system compatibility issues.