Pentium 4 / Athlon XP (1.8 GHz or 2.4 GHz for Vista/newer) RAM: 1 GB (2 GB recommended for modern Windows)

It looks like you’re asking me to about a specific warez release: “Hellgate: London repack by RG Catalyst uploade” (likely “uploaded” by RG Catalyst).

Deep in a reinforced bunker beneath the ruins of Canary Wharf, a technician known only as "The Catalyst" sat before a glowing terminal. The original archives of the demon invasion—the legendary Hellgate: London