Even now, the original Theme Park holds up well as one of the better theme park building and management games. Period. The inspiration for the (also excellent) Roller Coaster Tycoon many years later, Theme Park's sense of humour (inspiring its spiritual successor Theme Hospital), cartoony graphics and charm still set it apart from most other games today, and it's still very much worth playing. Where RCT focuses more on the park and ride design aspects, Theme Park delves deeper into the managerial side of running a theme, with research and staff negotiations playing a role as well. Highly recommended to fans of the genre.
I only got introduced to the Raiden series recently, but it's easy to see why it's considered a classic: solid shoot 'em up action with plenty of challenge, a lot of variety in ships and powerups, music that gets you pumped and nicely detailed 2D graphics that hold up extremely well even now. The lack of extra's may be a bit disappointing, and at $10 it's not the cheapest classic SHMUP on GOG--but for fans of the genre, Raiden Legacy still offers a lot of bang for your buck.
