s&box: Player movement with CharacterController — Accelerate, Move, IsOnGround, Punch

s&box: Applying forces and impulses to Rigidbody — ApplyForce, ApplyImpulse, velocity

s&box: Spawning prefabs and cloning GameObjects with GameObject.Clone()

s&box: Reading player input with Input.Down/Pressed/Released and AnalogMove/AnalogLook

s&box: Submitting stats to leaderboards and unlocking achievements with Sandbox.Services

s&box UI: Building HUD and menus with Razor PanelComponent — BuildHash, BindClass, StateHasChanged

s&box: Raycasting and physics queries with Scene.Trace fluent builder

s&box networking: RPC types — [Rpc.Host], [Rpc.Owner], [Rpc.Broadcast] and when to use each

s&box networking: Choosing the right [Sync] flags — FromHost, Query, Interpolate

s&box: Playing 3D positional sounds with Sound.Play() — position overload required for spatialization

s&box: Persisting save data with FileSystem.Data.WriteJson / ReadJson

s&box: Singleton Component pattern using static Instance with OnAwake/OnDestroy guard

s&box: Detecting which face of an object is up after physics — use Vector3.Dot not Euler angles

s&box: Detecting when a Rigidbody has settled after physics using IScenePhysicsEvents

s&box: Transform.Position is obsolete (CS0618) — use GameObject.WorldPosition

s&box: foreach over GameObject.Components fails — ComponentList has no GetEnumerator