Fallout's Vault 13 cave as a DOOM 64-style shooter, with S.P.E.C.I.A.L., chance to hit and Fallout's HUD, from your own copies.
Fallout's opening, played as a first-person shooter in the style of DOOM 64, with Fallout's role-playing intact. Fallout 64 is a port that runs from your own installed Fallout and DOOM 64. Nothing from either game ships with it.
Build your Vault Dweller. Spend points on S.P.E.C.I.A.L. and tag three skills, as in Fallout. Your stats set your hit points, Action Points, Armor Class and skills. Level-ups give skill points to spend on the character sheet (C).
Fight by Fallout's rules, in real time. Every shot and stab rolls Fallout's chance to hit: weapon skill, the target's Armor Class, distance against your Perception, and Strength. Luck-based critical hits, critical misses, damage thresholds and resistances, and ammo modifiers all apply. The rats roll against your Armor Class too. Every message is Fallout's own combat text.
Aim down the sights. Hold the right mouse button to raise the gun and zoom in. This is Fallout's aimed shot at the head: −40 to hit, +40% critical chance and 1 more AP.
In this version
Reach the cave mouth to finish this version.
Controls: click to capture the mouse · WASD move · mouse look · left click fire · right click aim · 1 knife · 2 pistol · R reload · H Stimpak · C character · Esc release mouse
Needs: Fallout (1997) and DOOM 64 (2020), both installed. Single player.