Simple choice today, sorry I didn't get round to posting sooner!

Jurassic Park: Trespasser - PC

Well head of the curve in terms of technology when it came out in 1998, but unfortunately suffered due to lofty ambitions and numerous project management issues. It actually still held up in terms of playability when I reviewed it back in 2006:

my Trespasser review

Due to it's unconventionally realistic setting and use of real-time physics; at the time standard machines couldn't keep up (average was probably 2-3fps) but the Trespasser engine was remarkable and still is impressive. It featured the first game world to be completely influenced by classical mechanics and was also the first game to use ragdoll physics. Yup, HL2 was NOT the first game to have physics based puzzles! :)

The game is clunky by today's standards but the sense of isolation, being hunted, the vastness and detail of game world is something few games have ever attempted since. Far Cry on the PC is probably the only game that has managed to create a similar world but it's not the same. Trespasser's finest moments have more in common with the lonelyness and fear of exploring the wastes of The Zone in the Stalker series (Pripyat in particular) and the discovery of ruins and past-events in Shadow of Colossus and System Shock 2 respectively.

Hammered for it's poor performance on launch and wildly unorthadox approach to FPS, I think Trespasser is the prefect example of an underrated game. This is not the train-wreck everyone said it was, and for those that can see past the rough edges there is an exceptionally intelligent FPS adventure here to be immersed in. The community is still alive and kicking too making new levels, mods, all sorts of exciting stuff.

Check it out:

TresCom