(from Alter A.I.L.A Variant's GamePage on RMN by Neok - June 10th 2012)
Alter A.I.L.A. Variant takes place in a modern world, 3 years after the events of Alter A.I.L.A. Genesis. 2 years ago, a great war came to a decisive conclusion thanks to the efforts of a small band of people. Peace should have followed, but there are those who would choose to continue fighting. This is the continuation of that story.
The battle system revolves mainly around each character's Abilities, which are a set of commands specific to that character. Abilities require AP and EX to use. AP is gained every time a character takes a turn. The default is 2. EX is gained every time a character uses an Ability. The default is 1. Note that this may change depending on the situation.
(Note: ...I wanted to wait for the right time to post this, but honestly there's never going to be a right time, so I thought I'd just get this out of the way quickly:)