OverTheWire
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Drifter

2014-12-29 - online with a caveat

Drifter is online but individual levels are untested and may have unintended bugs. If you encounter these unintended bugs, let me know (Steven on ircs://ircs.overthewire.org channel #wargames).

Drifter is a wargame along the lines of Vortex.

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