A Stickied-Thread for Hearts of Iron 3: Semper Fi Multiplayer Discussion. Once again, calling all Hearts of Iron Players! We have a core of 3 players right now (Myself, Mikebatzel, and Generalissimo) who play a weekly MP game. We are always looking for more players to join in! We play Vanilla Semper Fi but are starting to transition over to DiDays I.C.E Mod. Before you go all over the Mod, it is very simple to install and download. You activate it using a mod manage - its REALLY REALLY simple and will not mess up your Vanilla Game. Here is the link to download the mod: Paradox Interactive Forums I.C.E mod for Semper Fi Also, before you install it, download this file directly into you Hearts of Iron 3 main directory (and install it there too): Paradox Interactive Forums JGSME Mod Manager When you launch the program (the mod manager) it will create a Mods Folder. Install the ICE Mod into the folder (extract all files to the MODS folder - I created a folder called ICE in the mod folder to keep the files in one place.) Then, before you launch HOI 3, launch the Mod Manager and activate (or deactivate if you want vanilla) the mod. Really simply.