Details:
Unitecoin was a scrypt coin retargeting every 60 blocks, awarding 50 coins per block, with 2-minute block times. It launched halving the block reward every 840000 blocks. The announcement made on Bitcointalk at https://bitcointalk.org/index.php?topic=372707.0 says every 84000 which would have been about 3 months, but the source code at https://github.com/unitecoin-org/Unitecoin/blob/master/src/main.cpp says 840000 which is about 3 years. Its nominal block time was two minutes according to the source. It was released initially on December 1, 2013 with an announcement on cryptocointalk, and was not announced on bitcointalk https://bitcointalk.org/index.php?topic=372707.0 until 16 December. About 3 weeks worth of coins at nominal block rates were already gone by the time it was announced here, so Unitecoin was considered by some to have been premined. The blockchain shows that the first 3 thousand blocks or so - about a week's worth at nominal rates - was mined very fast, but that's likely due to ordinary launching at low difficulty. Trading in Unitecoin appears to have started at a market cap of $196 on April 16 2014 and ended at a market cap of $28 on May 27 2014. During that brief time it had four peaks in market cap, to US$591, $1136, $1141, and $635. Between these peaks, it crashed to $38, $75, and $62. The trading history is truly remarkable in that it appears to have gone through FOUR separate pump-and-dumps, each capable of transferring up to 90% of the bagholders' remaining money into the pockets of the dumpers. This doesn't usually happen, if only because after one or two pumps all the sufficiently gullible bagholders are broke.