
Enter cheats onto the dialogue box of that window. Matchmaking is available through GameRanger.These cheats only work in single player mode.In game press CTRL+SHIFT+S to bring up the game settings menu. Multiplayer is available in LAN or Internet play for up to 16 players. The player may also use Cabinet Ministers to assist with the operation of their regions, through the use of a Minister-priorities system and an in-game email system. Optionally players may leave unit initiative turned on, which will allow the AI to control military units for the player. The military element of the game is played through battalion-sized units represented on the game map, that can be controlled and given orders using the mouse individually or through groupings. Supreme Ruler 2020 generally operates as a real time strategy game, though players are able to pause the game or change the game speed. Diplomatic options include alliances, treaties, and trades of resources and technologies. The player decides what military units to build, what facilities to build, how much or how little of a resource to produce, and also sets government policies in areas such as finance and social services. The player controls the economies, the militaries, research, government spending, spy operations (including the launching of satellites), and diplomacy. There are over 250 playable regions simulated in the game. The game allows players to choose either Scenarios with a defined scope and objective, or a Campaign "Sandbox" mode where there are no pre-determined victory conditions.

A Gold Edition of the game containing both the core game and the expansion pack was released on September 18, 2009. On DecemBattleGoat Studios released an Expansion pack for the game titled Global Crisis. In the game, the player controls all aspects of a region's government attempts to unite a world of fragmented states.

The game was released on Jand is a sequel to Supreme Ruler 2010. Supreme Ruler 2020 is a grand strategy computer wargame developed by BattleGoat Studios and published by Paradox Interactive.
