Unity 2D slope normalizer for walking up and downhill with corner snapping. Based upon https://www.youtube.com/watch?v=xMhgxUFKakQ

normalize-slope.cs

// @NOTE Must be called from FixedUpdate() to work properly
void NormalizeSlope () {
	// Attempt vertical normalization
	if (grounded) {
		RaycastHit2D hit = Physics2D.Raycast(transform.position, -Vector2.up, 1f, whatIsGround);
		
		if (hit.collider != null && Mathf.Abs(hit.normal.x) > 0.1f) {
			Rigidbody2D body = GetComponent<Rigidbody2D>();
			// Apply the opposite force against the slope force 
			// You will need to provide your own slopeFriction to stabalize movement
			body.velocity = new Vector2(body.velocity.x - (hit.normal.x * slopeFriction), body.velocity.y);

			//Move Player up or down to compensate for the slope below them
			Vector3 pos = transform.position;
			pos.y += -hit.normal.x * Mathf.Abs(body.velocity.x) * Time.deltaTime * (body.velocity.x - hit.normal.x > 0 ? 1 : -1);
			transform.position = pos;
		}
	}
}