the original ZX Spectrum Underwurlde release. Critics noted the game world's size and appreciated the parts where Sabreman travelled by bubble. Retro Gamer described the game's near 600 flip screens as "colossal". At the time of its release, Computer and Video Games said it was likely the most expansive world on the platform. Later reviews noted the game's exceptional difficulty. Crash magazine recommended the game as "A Crash Smash". ZX Spectrum magazine Crash considered Underwurlde to be "excellent" and Ultimate's best game. Each of the magazine's three reviewers appreciated different features of Sabreman's navigation within the game, but mainly liked riding volcanic bubbles and being carried by birds. Another reviewer compared Sabreman's jump to that of Bugaboo (The Flea) and added that the game's single difficulty level was adequately balanced. All three Crash critics noted that the QWERT keyboard controller mapping worked well in this game, though it was awkward in others. They also praised Underwurlde detailed graphics and sound. One reviewer additionally noticed that the game lacked a score leaderboard, but surmised that this was a trade-off for the game's expansive world. Unlike Crash, Computer and Video Games did not like the controls, which was the reviewer's main criticism of the game. Another ZX Spectrum reviewer, Chris Bourne (Sinclair User), said that the game was fast, colourful, and akin to a "vertical Atic Atac". Commodore 64 magazine Zzap!64 reviewers were mixed. Jaz Rignall said it was among the best arcade adventures on the Commodore 64 since it had the right balance of frustration and addiction to keep him playing the ZX Spectrum version for weeks. Gary Penn, however, considered the game average when it first released for the ZX Spectrum and thought that the port of the year-old game had out-of-date sounds, out-of-tune title music, and was overall not among the Commodore 64's best adventure games. Gary Liddon thought that the Commodore 64 version appeared "crude" compared to other releases for the platform, though perhaps par for the ZX Spectrum. The magazine noted the difficulty of traversing the vertical caverns and found the eagles annoying, especially when they dropped Sabreman to his death. Zzap!64 critics felt that the game presented well, but was less accessible, overpriced for its age, and poorly animated. Ultimately, they considered the game better than the developer's previous two 1985 releases, but not as good as it could have been. The Computer and Video Games