UNITY PLANET GRAVITY From http://pastebin.com/YBbFGZzD#

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// Unity Tutorial Here: http://youtu.be/TicipSVT-T8
// Sebastian Lague
 
using UnityEngine;
using System.Collections;
 
[RequireComponent (typeof (Rigidbody))]
public class GravityBody : MonoBehaviour {
 
        GravityAttractor planet;
 
        void Awake () {
                planet = GameObject.FindGameObjectWithTag("Planet").GetComponent<GravityAttractor>();
 
                // Disable rigidbody gravity and rotation as this is simulated in GravityAttractor script
                rigidbody.useGravity = false;
                rigidbody.constraints = RigidbodyConstraints.FreezeRotation;
        }
       
        void FixedUpdate () {
                // Allow this body to be influenced by planet's gravity
                planet.Attract(transform);
        }
}
 
using UnityEngine;
using System.Collections;
 
public class GravityAttractor : MonoBehaviour {
 
        public float gravity = -9.8f;
 
 
        public void Attract(Transform body) {
                Vector3 gravityUp = (body.position - transform.position).normalized;
                Vector3 localUp = body.up;
 
                // Apply downwards gravity to body
                body.rigidbody.AddForce(gravityUp * gravity);
                // Allign bodies up axis with the centre of planet
                body.rotation = Quaternion.FromToRotation(localUp,gravityUp) * body.rotation;
        }  
}
 
using UnityEngine;
using System.Collections;
 
[RequireComponent (typeof (GravityBody))]
public class FirstPersonController : MonoBehaviour {
 
        // public vars
        public float mouseSensitivityX = 250;
        public float mouseSensitivityY = 250;
        public float walkSpeed = 6;
        public float jumpForce = 220;
        public LayerMask groundedMask;
 
        // System vars
        bool grounded;
        Vector3 moveAmount;
        Vector3 smoothMoveVelocity;
        float verticalLookRotation;
        Transform cameraTransform;
 
 
        void Awake() {
                Screen.lockCursor = true;
                cameraTransform = Camera.main.transform;
        }
 
        void Update() {
 
                // Look rotation:
                transform.Rotate(Vector3.up * Input.GetAxis("Mouse X") * mouseSensitivityX * Time.deltaTime);
                verticalLookRotation += Input.GetAxis("Mouse Y") * mouseSensitivityY * Time.deltaTime;
                verticalLookRotation = Mathf.Clamp(verticalLookRotation,-60,60);
                cameraTransform.localEulerAngles = Vector3.left * verticalLookRotation;
 
                // Calculate movement:
                float inputX = Input.GetAxisRaw("Horizontal");
                float inputY = Input.GetAxisRaw("Vertical");
 
                Vector3 moveDir = new Vector3(inputX,0, inputY).normalized;
                Vector3 targetMoveAmount = moveDir * walkSpeed;
                moveAmount = Vector3.SmoothDamp(moveAmount,targetMoveAmount,ref smoothMoveVelocity,.15f);
 
                // Jump
                if (Input.GetButtonDown("Jump")) {
                        if (grounded) {
                                rigidbody.AddForce(transform.up * jumpForce);
                        }
                }
 
                // Grounded check
                Ray ray = new Ray(transform.position, -transform.up);
                RaycastHit hit;
 
                if (Physics.Raycast(ray, out hit, 1 + .1f, groundedMask)) {
                        grounded = true;
                }
                else {
                        grounded = false;
                }
 
        }
 
        void FixedUpdate() {
                // Apply movement to rigidbody
                Vector3 localMove = transform.TransformDirection(moveAmount) * Time.fixedDeltaTime;
                rigidbody.MovePosition(rigidbody.position + localMove);
        }
}
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