Battlefield nuke is a very simple card game for up to four players. It currently does not support AI (but it doesn't require 4 players, it is playable, maybe even better, in 2 players).
Rules:
The rules are totally simple. Players take turns in playing cards from their hands. Each player has 5 cards in hand and can play up to all of them in his turn, as long as they are of the same type.
Each card represents a unit that is called to battlefield by playing the card. Each unit has a list of other units, that it's capable of destroying. When the unit is deployed, it destroys all units of one type from the list (chosen by the player), then deactivates. It will then wait on the battlefield until it's destroyed by someone else.
Special unit is the Ghost, of which you must play three cards to activate. They launch nuke, destroying a number of units and increasing nuke counter. Once nuke counter reaches 3, the game ends.
Players score points for destroying units, the one with mose point wins.
Status:
Game is fully playable, with room for improvement (now there is just a terran deck, maybe I could add protoss one with different unit relations...). It has been published on EU for quite some time, it even made it to first screen couple times.