Castlevania II: Belmont's Revenge (not to be confused with Castlevania II: Simon's Quest and known in Japan as Dracula Legends II) is a 2D action horror platformer developed and published by Konami for the Game Boy in August 1991.
The sequel to Castlevania: The Adventure, Castlevania II: Belmont's Revenge re-adds the sub-weapon system from the previous Castlevania games. Similar to the original Mega Man games, this game allows the player to play the four initial stages in any order.
Set 15 years after vampire hunter Christopher Belmont defeats Count Dracula, Dracula returns and kidnaps Christopher's son, Soleiyu. The forces of darkness transforms Soleiyu into a demon, which aids Dracula's resurrection into human form. Players control Christopher as he travels through five castles in order to confront Dracula and rescue his son.
Refined from its predecessor, Castlevania II: Belmont's Revenge features smoother control and more well thought-out level design.
In this go round, Christopher covers slightly more ground with his jumps, and it seems as if it's easier for the player to land successful jumps. Moreover, the levels seem to have been designed with jumps that are more reasonable for a man of Christopher's athleticism (or lack thereof) to land.
Christopher also walks faster, and while "lumbering" is still an apt adjective for him (or any 8-bit Belmont for that matter), the game feels far more akin to a traditional NES Castlevania title than did its predecessor. Christopher is still slow to climb the ropes used for vertical progress (as did its predecessor, this game lacks stairs), but can now slide quickly down those ropes if the player holds down the "A" button while climbing down. This is not only a convenience but also a necessary mechanic for avoiding moving spike walls while on a rope.
Christopher retains the twice-upgradeable whip (normal to chain to chain-fireball), but no longer loses his upgrade when hit by any enemy (though there are specific enemy attacks may downgrade his whip a level). The chain whip is twice as powerful as the normal whip; each fireball does the same damage as a normal whip strike.
Sub-weapons make an appearance here as well. They are limited to the Axe and Holy Water, but already these are useful additions to Christopher's arsenal and give the player a few more options to tinker with, further separating Belmont's Revenge from the previous game in the series.
Accordingly, hearts do the traditional Castlevania job of serving as ammunition for these sub-weapons. Coins make their return here from the previous game, with the Castlevania staple of pot roast serving as the standard health-replenishment item. 1-ups can also be found on occasion. Hearts, coins, and sub-weapons are found in candles, with pot roast and 1-ups being hidden in destructible walls throughout the game's levels.
As mentioned above, Christopher can elect the order in which he tackles the first four stages of the game. They are the Crystal Palace; Sky Palace; Plant Palace; and Rock Palace. As their names would imply, each level carries with it its own theme and hazards. Each of these levels is largely linear, though there are limited instances where you can choose between one of two different paths through a small portion of the level. Capping off each of these levels is a boss enemy
After the initial four bosses have been defeated, Dracula's Castle surfaces in the center of the stage select screen. At this point, Christopher is launched into a completely linear portion of the game that mimics the first Castlevania on NES: Each individual level represents a different area of Dracula's Castle as Christopher battles to the spire.
When Christopher loses all of his lives, he is afforded unlimited continues. Using a continue will drop you at a mid-level checkpoint if you've reached far enough, and you also are afforded a password in case you want to pick up Christopher's adventure at a later time. Progression is therefore much more forgiving in this game than its predecessor.