What is "underwurlde"

Underwurlde is a 1984 action-adventure platform video game in the Sabreman series by Ultimate Play the Game for the ZX Spectrum and Commodore 64. The player controls the adventurer Sabreman as he jumps between platforms in a castle and its underground caverns to find an escape past the exit guardians. Underwurlde features about 600 flip screen areas. Unlike other games of its time, Sabreman is not damaged when touched by enemies and is instead knocked backwards. Underwurlde is the second game in the series, between Sabre Wulf and Knight Lore, and released alongside the latter for the ZX Spectrum during the 1984 holiday season. Another developer, Firebird, ported the game to the Commodore 64 the next year.

Reviewers recommended the original ZX Spectrum Underwurlde release. They noted its expansive game world and appreciated the parts where Sabreman travelled by bubble. Later critics commented on the game's frustrating difficulty. While the Commodore 64 version was similar to the original, reviews were mixed—one critic thought the title had aged poorly in the year between releases. Your Sinclair placed Underwurlde within its top 20 for the ZX Spectrum, though their readers put it near the bottom of their top 100. The game was later included in Rare's 2015 Xbox One retrospective compilation, Rare Replay.