> For the complete documentation index, see [llms.txt](https://saisen.gitbook.io/saisen-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://saisen.gitbook.io/saisen-docs/saisen-overview/what-is-saisen.md).

# What is Saisen

## **Overview**

**Saisen** is a fully on-chain GameFi protocol that reimagines the “last-bid” auction format with strategic depth, and randomized rewards.

At its core, players **bid using pOAS or OAS** to compete in time-based prize pools. Each new bid resets a countdown timer. When the timer runs out:

Prize will be distributed in pOAS:

* **Winner's Prize: 68%** of the pool goes to the **last bidder**.
* **Lottery Prize: 20%** is equally distributed among **10 randomly selected past bids**.
* A **12% House Edge** is taken:
  * **8%** is distributed to **SAISN‑OAS LP stakers**.
  * **4%** goes to the **Treasury**.

## Core Game Mechanics

### **Saisen unfolds in two phases:**

**Bootstrap Phase (First 24 hours)**

* The game runs without a winner — no timer stop or prize distribution.
* Minimum bid is fixed at **10 (p)OAS**.
* every 10 (p)OAS = 1 lottery ticket
* This phase safely builds up the pool and avoids early bot dominance.

**Main Game Phase**

Once the Bootstrap Phase ends, the game enters its core loop:

1. **Minimum bid** is set to **0.5% of the current pool**.
2. Each new bid **resets a 1-hour countdown timer**.
3. When the timer runs out:
   * **68%** of the pool goes to the **last bidder**.
   * **20%** is equally distributed among **10 randomly selected past bids**.
   * A **12% House Edge** is taken:
     * **8%** is distributed to **SAISN‑OAS LP stakers**.
     * **4%** goes to the **Treasury**.