This page contains Lego: Mars Mission Hints for PC called "More credits" and has been posted or updated on Jun 9, 2009 by Valadrim.
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Enable the fatwallet code. Enter the pizza level and kill all aliens in the area. Do not get the pizza. Build two or three Crystal Miners then mine the crystals. Wait until you get 100,000 credits.
Please submit a problem for any incomplete, non-working or fake cheat listed above.