Kingdom Hearts: Denial in Oasis is the eighth installment in the Kingdom Hearts franchise, the ninth being Kingdom Hearts 3. Set sometime during the events of Kingdom Hearts 2, it follows a keyblade wielder named Quinn who finds herself in a Grand Central like location that has portals to the worlds. Like Kingdom Hearts Dream Drop Distance, this game is also on the 3DS. This game was announced during a Witching Hour that revealed this game, Wasteland Warriors, and Kid Icarus: Mythis.
The game is supposedly the "Majora's Mask" to Kingdom Hearts 3D (as they share the engine but there are gameplay differences), with a darker story. It is pretty disconnected from previous entries in the franchise, being nearly self-contained.
The game, which largely follows the action RPG gameplay of previous games in the series, sees players playing as Quinn, a new character to the franchise as well as Keyblade Wielder. The Drop system has been, well, dropped. The game reuses the Command Deck system from Birth by Sleep, in which players can customize a deck filled with various actions, spells, and items that can be quickly selected. There are also several new elements added to the gameplay. Flowmotion allows players to move quickly about by performing actions such as bouncing off walls, grinding on rails and spinning around poles. Reality Shift is a system the player can use on certain objects or weakened opponents involving a touch-screen activated minigame unique to each world.
One of the key elements of Denial in Oasis is the inclusion of the Endless, the main enemies of the game. Although they can be beaten like other enemies, Quinn can also use Reality Shift on them to fuse with the enemy and gain powers similar to the enemy. However, this limits Quinn's health to what the enemy had, and Quinn will die if her health reaches zero. She can eject from the enemy at any time and can even use this to traverse the levels.
The game takes place across multiple worlds based on The Dark Crystal, Darkwing Duck, and more. These worlds are accessed through the Grand Terminal system. Unlike previous entries in the series, you will simply just be teleported to the world.
Quinn wakes up in a strange "Grand Terminal" area and finds that she cannot recall where she came from. She comes across Agnes Oblige and Edea Lee, who find her fascinating.
Like in Kingdom Hearts 2, some characters will come to assist you in worlds. All these members are temporary and do not carry with you into other worlds.