Original Rogue Survivor: http://roguesurvivor.blogspot.com/ ; source at https://github.com/roguedjack/Rogue-Survivor-Alpha-9 .
Alternate forum threads:
The main licence is GPLv3 ( https://opensource.org/licenses/GPL-3.0 ), with specific additional requests from Roguedjack to be non-commercial and to maintain the original brand identity: http://roguesurvivor.proboards.com/post/2604 .
RS Still Alive http://roguesurvivor.proboards.com/thread/377/rs-alive
Please note a recent reversion in the release format. To accommodate incremental upgrades for players with weak Internet connections, binary-only and media-only ZIPs that are not intended to be playable out of the box are being provided for the unstable releases starting with 2018-04-04.
First installs on a machine should use a complete ZIP archive. If the media archive matching a binary archive does not exist (e.g., 2018-04-07 has no media-only archive), there has been no change since the most recent media-only archive -- and the binary-only archive is sufficient to upgrade.