Seems like an ok game but honestly, any tech Valve makes is bound to have zero to no support. Valve computers, controller and now VR with nothing but one story-heavy game. I assume they'll make Portal 3, Half-Life 3 and maybe Left 4 Dead 3 eventually and maybe that will cause the interest to rise? Who knows. I highly doubt anyone is going to risk developing primarily for VR anyway. People are making a huge fuss over 500$ gaming console, most never buy gaming computers because they require 1000$+ and you want to sell a gaming headset for 1000$ which may make people feel sick? Without any massive games? I don't know what Valve were thinking. Even Sony didn't achieve much with their Japanese support and the resources to make VR a thing.
Anyway, I'm not interested in Valve exclusives so it doesn't bother me. Portal is pretty fun but the puzzles do get very difficult quickly, Left 4 Dead is a little gross, Half-Life - played the second game and it was fun, sure, can't say I remember anything from it