XSF / Guides / Make an FPS game in Roblox

How to make an FPS game in Roblox Studio

The guns are the hard part of a Roblox shooter, so start with a gun system that already works and spend your time on the game. This guide uses XSF (free, 59 guns) and ends with a team deathmatch with a leaderboard and timed rounds.

Steps

1. Install XSF. Follow how to add guns to Roblox Studio. About three minutes. If you don't have a map, drop in XSF_TestMap from the download.
2. Pick the loadout. Set Loadout in GameConfig, for example { "M4A1", "MP5", "G17", "KaBar", "M67" }, or use the dashboard.
3. Add two teams. Insert two Teams under the Teams service, name them Red and Blue, give them colours and turn AutoAssignable on. Add a SpawnLocation for each team with the matching TeamColor and Neutral off. Turn friendly fire off with Damage = { FriendlyFire = false }.
4. Count kills. Add a leaderboard with a server Script (below). XSF tells you who got the kill.
5. Add rounds. A loop that resets scores, waits and announces the winner (below).
6. Pick the feel. Camera style (bodycam or standard), movement, downed and revive, crosshair and more are one line each, or one click on the dashboard.
7. Publish. File > Publish to Roblox, and keep Allow HTTP Requests on in the published game.

Kill leaderboard

Put this in a Script in ServerScriptService:

local Players = game:GetService("Players")
local XSF = require(game.ServerScriptService.XSF.Server)

Players.PlayerAdded:Connect(function(player)
	local stats = Instance.new("Folder")
	stats.Name = "leaderstats"
	local kills = Instance.new("IntValue")
	kills.Name = "Kills"
	kills.Parent = stats
	stats.Parent = player
end)

XSF.Killed:Connect(function(victim, killer)
	if killer and killer:FindFirstChild("leaderstats") then
		killer.leaderstats.Kills.Value += 1
	end
end)

Timed rounds

A second Script. Swap the print for your own UI when you're ready.

local Players = game:GetService("Players")
local ROUND = 300 -- seconds

while true do
	for _, p in Players:GetPlayers() do
		if p:FindFirstChild("leaderstats") then p.leaderstats.Kills.Value = 0 end
		p:LoadCharacter()
	end
	task.wait(ROUND)
	local best, top = nil, -1
	for _, p in Players:GetPlayers() do
		local k = p:FindFirstChild("leaderstats") and p.leaderstats.Kills.Value or 0
		if k > top then best, top = p, k end
	end
	print(best and (best.Name .. " wins with " .. top .. " kills") or "No winner")
	task.wait(10)
end

Ideas to build on

The docs have recipes for each of these: a class picker, gun game (a new gun every kill), battle royale loot with pickups and ammo boxes, a kill feed, a gun shop, and unlocks or skins tied to levels. For NPC enemies, give any Humanoid an XSF_Weapon attribute.

Questions