Supaplex,
1991 [liberated]
Supaplex appears to be a hugely popular
Boulder Dash clone that was made freeware by the original publisher with approval from the original developers. The source code has been lost, but the DOS version was bugfixed using binary hacking, and there's also a faithful
open source recreation.
Bref,
1997 [shareware, freeware]
This is a very nice and colourful SVGA
Columns variant. Version 2.0 was released as freeware, previous versions were marketed as shareware.
NOTE: The game for some reason has graphical and sound glitches in DOSBox if you run it with Sound Blaster sound/music, but works flawlessly if you use Gravis Ultrasound -- DOSBox only needs to be set to gus=true, no additional drivers/patches are needed to be installed in ULTRADIR.
Die Pirateninsel,
1998
A neat SVGA
Boulder Dash like game that is rather similar to
Trugg -- each level/puzzle takes up one screen. It's in German only but knowledge of language is not really required to play. The demo (originally available from publisher's FTP) was kindly provided by
Hallfiry from a coverdisk in his collection.