I'm still playing Resident Evil 5 and it's been an absolute blast last few days! The combat is incredible fun as is the boss battles, plus the levels are really enjoyable and even the story is fairly well done surprisingly. Playing with an AI companion works very well and I can see co-op being one of the best experiences of its kind with splitscreen, online and local available. The inventory management emphasis also plays an big role here which really adds to the gameplay. I'm approaching the 10 hour mark and still not done yet and with chapters graded on performance, there is definitely going to be a lot of replayability here. I'd seriously consider picking it up before the Capcom platform-wide sales end. You don't even need to be a veteran of the series to have fun with this. First hour is a bit slow but then it really gets going.
Game still looks fantastic after 14 years too!