I feel I need to draw peoples attention to this free game. I only discovered it yesterday but it's seriously awesome. It's a mix of First Person with the old school text/point-n-click so has a retro feel.
It's also available on Windows, Mac and Linux which is great!
Dead Cyborg - first person view, hard-sci-fi adventure game
The first Ep is ony 30Mb, with Ep 2 coming in at 35Mb so there is no reason not to try it! It also looks surprisingly nice too:
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