ATOM RAIN is a free mod for Doom II, a popular first-person shooter game with various release versions, such as GZDoom. In addition to changing the game's premise, ATOM RAIN makes changes to bring a stronger focus on faster deathmatches and single-player gameplay.

The changes in the game's premise include setting it within an alternate version of the 90s. It was inspired by another popular first-person shooter from the same period, Duke Nukem 3D. The new narrative involves a secret interdimensional war between corporations.

A new look for an old classic

While there are a lot of changes made to the fundamental gameplay, the most visible changes are the visual and narrative aspects. The story has moved from the hellish landscape of Mars to the urban setting of an alternate 1990s, where a secret interdimensional war is taking place. There are single-player and multiplayer modes to explore in these new settings.

Gameplay changes

The mod makes several changes to the core gameplay, such as making it so that it plays faster and the deathmatches are more lethal. The weapons are intentionally unbalanced in pursuit of a specific gameplay feeling, though this may make for a less enjoyable experience for some.

A nostalgic mod

ATOM RAIN attempts to incorporate several nostalgic elements from first-person shooters of the 90s. As a result, it may not appeal to players who were not around at that time. However, for fans of Doom II, this mod offers a very changed playing experience that can be enjoyed alone or with friends in both cooperative and competitive modes. This can provide additional playability to this classic game, despite its continued popularity and the fact that it's now very old.