Tower Defense Games

Linear First Person Puzzle Games

If you like puzzle games have you played the entropy center? Its better than portal IMO

RPGs in the style of the Ultima games, specifically ones that use a keyword-based conversion system. Aside from the Ultima series itself, the only other examples I know of that use a system like this are Cythera - a 1990s Macintosh shareware game that was very similar to Ultima 6 and 7 - and The Elder Scrolls 3: Morrowind.