Kerbal Space Program - Mun Mission Using Only SRB's
Not just any old challenge, but a tribute to the British Interplanetary Society's speculative design for a real life moon rocket published in 1939. ( http://www.bis-space.com/ )
Before anyone asks, it took about 20 tries to perform the landing correctly, you need to cut the power with a margin of about 0.1 seconds, and I'd wasted all my sepatrons on making sure I didn't land on the wrong side of the Mun.
Kerbal Space Program is an indie sandbox game developed by Squad http://kerbalspaceprogram.com
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At this time, Scott Manley has 162,858,247 views for Kerbal Space Program spread across 865 videos. There's over 15 days worth of watchable video for Kerbal Space Program published on his channel, roughly 41.76% of the content that Scott Manley has uploaded to YouTube.