引用自 Half-Life Fandom：

While very little is known about the Rollergrub, the name itself speculates that it was to curl into a ball and roll to enemies, then unfurl and attack. The Rollergrub was 'supposedly' found in an old folder, in which it is briefly explained what the Rollergrub's attacks were. Alongside the announcement of the Rollergrub, a few texture leaks were found.