RE3 was a reverse engineered product. It used the original source and logic to derive an ABI compatible implementation. This has always been a grey area-outright illegal activity. It's the entire reason Compaq clean room engineered (or, at the very least, claimed to) their BIOS all the way back in 1982.
Every time I hear people complain about this, I just have to roll my eyes. Go do a clean room implementation like OpenRA and you're legally pretty safe. Use their IP and you're just asking for them to easily shut you down once you catch enough attention.
Every time I hear people complain about this, I just have to roll my eyes. Go do a clean room implementation like OpenRA and you're legally pretty safe. Use their IP and you're just asking for them to easily shut you down once you catch enough attention.