I found via system task explorer, that ONI starts at around 3.1 GB RAM and after every ingame LOAD, it adds another ~200 MB of RAM. After few loads game consumes nearly all system memory (depends on hw configuration) and crashes.
You should really look at memory optimalization of game, because clearly memory is used by every load but not freed or reused from previous loads.
Steps to Reproduce
1. Open system memory explorer 2. Start ONI 3. Load any game 4. Look at system memory value 5. Load game again 6. Look at system memory - value will be ~200 MB higher 7. Repeat steps 5-6 to crash ONI/PC
This issue has not been confirmed by a developer yet.