Kimppa is Finnish for “shared” or “together”, as in kimppakyyti, a shared ride. It fits: the whole mod is about driving, fixing things and getting into trouble as a pair.
What is in the first version
We split the game into eleven parts and built sync for each one: cars, the Satsuma, items and the shop, jobs, quests, the world and police, the player, money, the house, events, plus a set of testing tools.
We also went through all of the game’s logic. My Summer Car has more than six and a half thousand small scripts that move the world: they open doors, count money and switch lights on. For each one we noted whether it has to run for both players, whether one is enough, or whether something else already covers it. Without that it is easy to miss details like a guest’s lottery ticket winning on its own.
How we tested it
Every mechanic has an automated test that runs inside the real game. The last full run had 225 scenarios and no failures. Along the way the tests found real bugs. For example, if the guest bought something while the shop on the host’s side was asleep on the other side of the map, the goods got lost. Now the host wakes the shop up first and the purchase reaches both players.
What comes next
- Testing everything with two people on two PCs and two accounts. An automated test is good, but a real friend finds things a program never thinks of.
- Connecting payments. Once that works, the buy page gets a Steam sign-in.
- Fixing what we find and writing about it here.
If you have an idea of what else should work for two, tell us. We read the list of things players want to see.
