Arimaa vs Terraforming Mars

Arimaa is a game suitable for both young and old, it was made to be intuitively simple but with a lot of depth. Even the setup follows this premise - you set up the figures in two rows like in chess, but you can place them in any way you like.

The rules are simple – in your turn you have four actions. You can either move a figure four times, move four figures one time, or do any combination in between. All figures can move forwards, backwards, and sideways apart from rabbits who can’t go backwards.

You can use two actions on a stronger piece to push or pull your opponents’ weaker figures. These stronger figures also “freeze” adjacent weaker pieces, preventing them from moving unless there’s a friendly piece next to them. If a figure happens to walk into one of the four trap squares or get pushed/pulled into one without a friendly piece next to it, then it is removed from the game. The first player to get a rabbit to reach the opposing side wins. The game can also be won by removing or immobilizing all your opponent’s rabbits.

The official site of Arimaa is quite lively and features reviews, downloads, the latest news, an active public forum, and much more. There’s even an online gameroom, so you can play Arimaa against computers or other people in either turn-based or real-time games. There are many people online, so it shouldn’t be a problem to find a game.

In case you don't want to purchase the gameboard made by Z-Man Games, you can use the components of a regular chess set. It also helps if you have four coins to mark the trap squares. You probably already have the equipment you need.

The 4 moves per turn gives Arimaa's tree of possible moves a very high branching factor. (It was invented for AI programmers as a game more difficult to program for than chess, but easier than Go). You can't think several turns ahead like chess (the space of possibilities is too big), instead you have to think in terms of distances and capabilities, giving Arimaa a very fluid feel.

The constant anticipation and sense that you're working towards a goal is very pronounced. At the start of the game, you'll have limited money and resources, but as the game progresses and these resources accumulate, you can start to do more and more things each turn. Seeing your strategy slowly start to pay off as your corporation grows, and knowing you'll soon have the resources to unleash your big play helps to keep you excited for the next round.

Juggling your resources, money, and production against your opponent's actions as you try to satisfy the win conditions (getting the oxygen, temperature, and ocean coverage to their desired levels) can be pretty intense. Always having to think several turns ahead will definitely appeal to people who like a game that makes them strategize and prioritize. Choosing which cards to buy each round, what to spend your resources on, and how to terraform the planet without giving too much leeway to your opponents creates plenty of situations to outplay others.

There are over 200 unique project cards in the game that represent all of the terraforming projects available such as introducing plant or animal life, greenhouses, new buildings, and more.

Since you'll be drawing random cards in a random order each time you play, each and every game session turns into a unique experience. Even if you've seen a card in a previous session, the conditions on the board (oxygen levels, temperature, and ocean coverage) will most likely be different than the last time you saw that particular card, meaning you'll be calculating the cost vs. benefit of playing that card in a brand new way.

Additionally, each player-controlled corporation has its own specialties. Some examples are being able to substitute certain resources for money, or perhaps having an increase in production for specific resource. Each one plays dramatically different from the others, so something as simple as choosing a new corporation on your next playthrough will change your strategies.

The win condition states the oxygen, ocean levels, and temperature must reach a certain level. However, all three of these parameters are interconnected with one another, meaning you'll have to focus on all of them rather than just trying to brute force one.

For example, if you want to build a water production facility, you will need at least 2 ocean tiles in play. But in order for those ocean tiles to come into play, the oxygen and temp will first have to be satisfactory.

Overall, the game systems are very deep and complex, but the takeaway is that everything has a condition that needs to be met that is reliant upon all three parameters. This results in a very balanced experience where you need to pay heed to everything equally if you want to succeed.

There are several expansion packs which add new moons and planets for you to terraform. The rules and game flow is the same as the vanilla game, but they add new cards and corporations. The most interesting twist is that the board layouts are completely different for each expansion - with heat sources, oceans, etc in vastly different spots. They are an excellent addition that take the fun and excitement of the base game while giving you an all new playing field full of new possibilties.