martian rail railroad building game set fictional planet mar simultaneously game allow world canal noble savage cold high altitude desert globe nearly airless planet terraforme nanotech cyberpunk year science fiction story set mars game capture mood story feel planet game use refinement wraparound mechanism lunar rail simulate travel d oppose d map have think d wraparound mode add additional quotbrainburnquot empire builder franchise short distance point nt obvious straight linesee crayon rail game crayon fun

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