Installation Instructions mod Corrosive Eternity
You will need one of the following engines to run: IronWail, QuakeSpasm, QuakeSpasm-Spiked, VkQuake
Move the mars_e0m2 folder to the game's root directory
Launch the game, press Esc, open the console with the ~ key and type game mars_e0m2, or create a shortcut to the executable and add -game mars_e0m2 in the target field, then launch the game through it
Launch the game through the created shortcut
Play

