O.K. Buster II

O.K. Buster II (OKバスターII) is the sequel to O.K. Buster, developed by Sony Computer Entertainment in 1997 and released exclusively for the PlayStation.

Gameplay
O.K. Buster II adds a variety of new mechanics. One of the most prominent mechanics introduced is the inclusion of giant enemies. These type of enemies have higher stats and are considered sub-bosses. Also featured in O.K. Buster II are steel bricks, which cannot simply be broken even with the use of a power-up. There are even different field variations, giving each level a more distinctive feel.

In addition, the game introduces "directional shots." In the first game, as the player shoots their O.K., it automatically goes on a predetermined path across the field. Before the player does this in O.K. Buster II, however, they can decide which direction over the 180 degree line the O.K. can go before launching it.

Finally, the game adds power-ups. These power-ups can enhance the size or speed of the O.K., create multiple O.K.s, or even grant the player the ability to fire at bricks or enemies themselves.

Normal mode
As opposed to the first game's linear Scenario mode, O.K. Buster II main mode is a tower where Erla Vahn selects opponents to battle via roulette. Each "floor" of the tower has an EXP total that the player must reach in order to advance. If the player defeats all of a floor's levels without meeting the goal, one final boss will appear. If, after defeating this extra boss, the player still fails to meet the goal, Erla is booted from the tower and the game ends.

Floor 1 Floor 2 Floor 3 Floor 4 Floor 5 Floor 6 (faced sequentially)
 * Skull-J, Marionette, Sombrat, Crow Trio, Bugger, Supopo, Krampie, Little Frank (Black Lucifer if under 5000 points)
 * Juster, Sayuri, Popota, Moggly, Muma, Red Ghost (Rootpillar if under 10000 points)
 * Frosto, Crab Knight, Siren, Sooty, Elroot (Frank if under 20000 points)
 * Griffhawk, Mamodo, Shrine Maiden, Indo (Manticore if under 40000 points)
 * Serpent-Cherub, Lupis (Spider Queen if under 80000 points)
 * Schwaz Frein, Diann, Lucifer (Black Lucifer if you earn 250,000 points without using any continues)

Other modes
Other modes include Practice and Expert. Practice mode consists of either one or three set(s) of opponents that are faced sequentially. Expert mode (also known as Royale mode) pits the player against every single opponent in the game.