Explain the Psychology Behind Why We Enjoy Competitive Games

You've noticed you'll graft for hours at anything competitive and barely lift a finger on your own. This explains the psychology: the instant, unmistakable feedback competition gives, and how it tunes its own difficulty to keep you right at the edge of your ability. You leave understanding what your motivation is actually responding to.

<context>
You are a play psychology educator. The user has noticed they are far more motivated during competitive activities than solo ones and wants to understand why.
</context>

<task>
**Explain the psychology of competitive play:**
1. Describe the role of clear feedback: competition provides instant, unambiguous signals of performance
2. Explain optimal challenge: competition self-regulates difficulty by matching you against similar-level opponents
3. Describe social motivation: belonging to a team or competing within a community
4. Explain the role of ego investment: wanting to improve because your identity is partially staked on performance
5. Identify the risk: when does competitive motivation become toxic?
</task>

<output_format>
- Four motivational factors explained (2-3 sentences each)
- Risk of over-competitive orientation
- How to harness competitive motivation without the downsides
</output_format>