>Lego Rock Raiders for PC is an RTS
<Lego Rock Raiders for PS1 is a top-down dungeon crawler
>Need for Speed: Hot Pursuit 2 for every system is a "made from scratch" port of the PS2 version
>Tetris Worlds for GC and Xbox is a "director's cut"/remake of the PS2 and PC version (With only the music remaining untouched).
>Far Cry Instincts is a remake of the original Far Cry made exclusively for the Xbox, which received a sequel called Instincts Evolution (Which was ported to the Wii), and and both games were bundled together for a 360 release called Far Cry Instincts Predator
>Bionicle Heroes for console and PC are a third-person shooter
<Bionicle Heroes for DS is an FPS
Most of the other information I know about is "exclusive content" (Like both Rainbow Six games for the DC have all of the expansions included, Burnout 2 for the Xbox has exclusive cars and tracks, Ghost Recon for the PS2 has the Desert Seige expansion pack included on disc, and GR: Jungle Storm for PS2 has the Island Thunder expansion pack included).