Planescape Torment
Another Bioware game based on the Infinity Engine and the AD&D V2 rules. A lot of the BG2 modders community argue this is the best game of all. Currently Amazon are offering second hand white label copies for upwards of 50 quid.
Links
- Planewalker, a community site
- Also Planescape at Wikipedia; some people have nothing better to do.