- 关于同名地区，请见瑞士 (地区)。
瑞士（英文：Switzerland；德文：Schweiz；法文：Suisse；意大利文：Svizzera）是一个中等规模的国家，在神圣罗马帝国内，开局有5个省份。这使它跻身神罗第四大独立国家。 奥地利、 波希米亚和 萨伏依分别是前三。在1444年，瑞士有核心在萨伏依的省份沃州（1867）和瓦莱（1871）。它曾经是1444年开局日期少数几个官僚共和制国家之一，但在1.26之后改为寡头政治（前者成为遗产政体）。
瑞士 has cores on 萨伏依 and the Player should focus to get them as fast as possible. If it is not possible on the beginning, due to Savoy's allies, the best choice is to fabricate a claim on 巴登 and declare war on them. It is good to ally with 米兰 and OPM countries in HRE like 乌尔姆 or 阿尔萨斯. Also 普法尔茨 is a good opening move to easily take 巴登. After that, the Player should focus to get alliance with 法兰西 to not get invaded by 奥地利. Now Switzerland can focus on others OPM countries to get more land. Later The Player can declare war on bigger countries like 巴伐利亚 or 波希米亚. If the player is going for the Switzerlake achievement it is not recommended to fight with any Italian countries other than 萨伏依, only to reconquer Swiss cores. Then, Switzerland should slowly conquer other HRE nations. Also, a good way to become the strongest nation in the HRE, and later in Europe, is to stay as a republic, because switching between the different candidates that focus on military, diplomatic or administrative Monarch Power will mean you can always focus whatever type of Monarch Power you need at the current moment.
Switzerland should convert to Protestant, due to small morale and discipline bonuses. Also, later the player can fight in religious leagues to become the Protestant HRE Emperor if the nation has flipped from a republic to a monarchy. It will help with conquering more land in HRE without getting demanded unlawful territory.
For the first idea group it is recommended to take plutocratic idea group. It will help with winning wars, due to 10% morale boost and with managing the country unrest. Also, will provide small boost to income needed to develope the country. Influence are good for the second idea group. The Switzerland is bordering many OPM countries and it is easy to vassalize them. After that, the player can take ideas depending on their situation.