Quake: This free Quake mod is also a prequel to hack 'n' slash Slave Zero X, which is a prequel to a 1999 mech game

What's the most 90s way you can market your retro-styled prequel to a 90s mech shooter? Other than an Acclaim-style stunt where you offer people £500 to tattoo their baby's face with the game logo, I'd say perhaps relea…