Why does the poster depict G-man if you quote Nihilanth? Other than that it looks kinda cool, but the font would work better for a rock band concert poster rather than HL2 fanart.
Yes, Halo is definitely a copy of Half-life. I wanted to play some Halo the other day and turned on Half-life by mistake, didn't even notice until like third level.
I would dream I'm walking around an abandoned test chambers with a wormhole opening device, sloving puzzles by shooting multi colored portals at walls while a deranged AI is talking to me and cracking jokes. I also befriend a cube at some point.