Quake 3 is a massivly fast and an extremely efficient engine. fact.
As an avid programer, and as a human-oid, steam has huge problems that need to be resolved. Its lag being the main thing and the huge hdd space it cunsumes - currently 5 gigs for me.
Hmm, half life got so so far because of valve, apart from consuming every decent mod under the sun ( excluding ns ), it listened to its community, and acted. Jeeze, I just so hope that value wont go down the route that microsoft went --- oh f**k no. Quake would be linux.
Looks like q3 then :-p , I always did like carmack...