The game was developed on systems including dual-processor Pentium Pro 200s and Athlon 800s with eight and nine gigabyte hard drives, some using SCSI. The team used "more than 100 video cards" throughout development.[36] Deus Ex was built using Visual Studio, Lightwave, and Lotus Notes. They also made a custom dialogue editor, ConEdit.[36] The team used UnrealEd atop the Unreal game engine for map design, which Spector wrote was "superior to anything else available".[51] Their trust in UnrealScript led them to code "special-cases" for their immediate mission needs instead of more generalized multi-case code.[42] Even as concerned team members expressed misgivings, the team only addressed this later in the project.