(First off, I'm pretty sure there hasn't been a previous thread like this. But if there is, please feel free to pwn my n00b ass.)
So yeah, I guess this thread is to be used by internet people to inform other internet people about video games that are awesome but, for one reason or another, seem to have fallen under the radar for most. Basically this is a recommendations thread, just write a short description of the game, one or two screenshots and maybe some (legal) tips on how to acquire said game if it is not widely available.
My first recommendation is
Giants: Citizen Kabuto by Planet Moon Studios. The fact that Planet Moon is founded by people who used to work for Shiny (who were responsible for Earthworm Jim) should give most an idea of what to expect. The game doesn't take itself very seriously, which becomes evident when you realize that the game's main characters, the Meccaryns, basically amount to a bunch of Cockney guys on holiday. Other playable characters include Delphi the Sea Reaper (kind of like evil merpeople?) and the titular giant Citizen Kabuto (well, sort of). Gameplay is pretty much standard third person shooter fare with some RTS base building thrown in. Each character plays diiferently, of course, with the Meccaryns focusing on long range weaponry and squad tactics while Delphi mainly relies on sword and sorcery. Predictably, Kabuto's missions mostly involve eating people and destroying land formations, which is pretty fun. When it was first released, Giants was considered fairly cutting edge in terms of graphics, and I think it still manages to look pleasing despite probably having a lower polygon count than most PS2 games.
Availability: Last I checked this game could be found in stores such as CompUSA in the bargain software rack, usually packaged with another game and priced at around $10. There was also a special version packaged with some Geforce 3 video cards that included slightly improved graphical effects and textures, but those are pretty rare.