comparative overview


BlC AW D3D HL2 SL
in-game building -++/--++
avatar manipulation ++++/-+++
artifical intelligence +-+/-+-
server-side scripts +-+/-+++
client-side scripts ++-+/-+-
extensibility +-++++/-
open source --++-+/-
open standards --+/--+/-
interaction +/-+/-+++++/-
graphics quality +/-+/-+++++
built-in physics --++++
object collision --+++++
content tool support +/--+++-