K.O.L.M 1&2 (Extremely strange game, to say the least)
The ocean around me series (Trapped on an island, inexplicably enjoyable)
The mardek chapters (Best online games of all time)
Ether war (Pretty fun, short game)
Necronator (Not the second one)
Thelemite (For mindless destruction on an awesome level)
Company of myself (Very nice philosophical game)
Socrates Jones (Basic philosophical debate game - very basic representations of the philosophers, but not too shabby at least)
Battle for Wayland keep (Gameplay was boring and repetitive, but the in-between fight dialogue was enjoyable, especially the one with the pot-smoking guy)
Telepath RPG chapters (Hint: You're a telepath)
Soul tax (You're a ghost, and you can possess people!)
The sagitarian series (It's actually a chooseyourownstory)
Plasma burst series (Like a better version of Raze)
Frontier (Gets old after a while, but it's fun while it lasts)
Book of mages series (Surprisingly enjoyable)
Feudalism 1-2 (and eventually 3) (Nice war simulator, sort of)
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(I know this might sound like quite a few, but through years of occasionally playing games online, my favorites list has expanded quite a bit, and these were the hall of famers)