Sonic's success with their own brightly colored anthropomorphisms. These often were characterized by impatience, sarcasm, and frequent quips. A second generation of platform games for computers appeared alongside the new wave of consoles. In the latter half of the 1980s and early 1990s, the Amiga was a strong gaming platform with its custom video hardware and sound hardware. The Atari ST was solidly supported as well. Games like Shadow of the Beast and Turrican showed that computer platform games could rival their console contemporaries. Prince of Persia, originally a late release for the 8-bit Apple II in 1989, featured a high quality of animation. The 1988 shareware game The Adventures of Captain Comic was one of the first attempts at a Nintendo-style platformer for IBM PC compatibles. It inspired Commander Keen, released by id Software in 1990, which became the first MS-DOS platformer with smooth scrolling graphics. Keen's success resulted in numerous console-styled platformers on the PC, including Duke Nukem, Duke Nukem II, Cosmo's Cosmic Adventure, and Dark Ages all by Apogee Software. These fueled a brief burst of episodic platform games where the first was freely distributed and parts 2 and 3 were available for purchase. Decline of 2D The abundance of platformers for 16-bit consoles continued late into the generation, with successful games such as Vectorman (1995), Donkey Kong Country 2: Diddy's Kong Quest (1995), and Super Mario World 2: Yoshi's Island (1995), but the release of new hardware caused players' attention to move away from 2D genres. The Sega Saturn, PlayStation, and Nintendo 64 nevertheless featured a number of successful 2D platform games. The 2D Rayman was a big success on 32-bit consoles. Mega Man 8 and Mega Man X4 helped revitalize interest in Capcom's Mega Man character. Castlevania: Symphony of the Night revitalized its series and established a new foundation for later Castlevania games. Oddworld and Heart of Darkness kept the subgenre born from Prince of Persia alive. The difficulties of adapting platform gameplay to three dimensions led some developers to compromise by pairing the visual flash of 3D with traditional 2D side scrolling gameplay. These games are often referred to as 2.5D. The first such game was the Sega Saturn launch title, Clockwork Knight (1994). The game featured levels and boss characters rendered in 3D, but retained 2D gameplay and used pre-rendered 2D sprites for regular characters, similar to Donkey Kong Country. Its sequel improved