. ADFS::Games.$.Asylum .
. . . . .
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Archie: Yes
RedSquirrel: Yes
Commercial, Full version, 2 Discs
Digital Psychosis
This is one of the few platformer types I have ever enjoyed much. This was mainly due to the weapons, which get very silly later on. See the screenshot for a weapon example, and that is the first weapon I found.

Asylum is now available in updated and crossplatform SDL flavours from Acorn Arcade.