Disgaea: Afternoon of Darkness is a strategy RPG game developed by Nippon Ichi Software. It is available exclusively on the PlayStation 4 platform and offers a full version license. The game falls under the adventure subcategory of games and offers a unique game system that is both simple and addictive.

One of the unique features of Disgaea: Afternoon of Darkness is the Geo Panel. These are stat altering elemental properties that are placed on certain parts of the battlefields. The effect of these panels can boost or reduce your unit's stats and add an extra layer of strategy to the game. Another unique feature is the Geo Cube, which is a magic item that adds depth to multiplayer battles. You can use Geo Cubes to enhance your abilities, summon monsters, or even attack your enemies.

The game also features randomly generated Demon Gadgets that appear on the battlefield and can power up your units. Additionally, players can use transmigration, a form of reincarnation that allows them to start over from level 1, but with a stronger unit.

Overall, Disgaea: Afternoon of Darkness is a unique strategy RPG that offers a simple yet addictive game system. The various features and enhancements make this game unprecedented and will keep players engaged for hours on end.