Kagerasimaru

It's better to S Rank solo, because you dont share scores with your partner. And it's hard to rack up the combos necessary to get high enough points for S Rank when it's two people shootin down enemies. Only other way to get S Rank is to get a good time and dont get hit on missions.
Need 4 million points in a Stage for S Rank.

For a good time you get about 1million time bonus at the end.
If you get hit 0 times you get 5.5million Special bonus at the end.
Besides that if you dont get that Special bonus you need to get some good score and combo kills during the Stage to rack up enough points.

If people's systems got killed over a freeze, which many games and things can make your PS3 freeze randomly. Their PS3 are probly just old and had it coming. Nothing to do with Hard Corps. xD

The game wont kill your system, its fine on Rising mode and it only freezes 'by chance' if both people die and get the Continue screen and when you hit Retry sometimes it will freeze on the reload. It's random though, sometimes it happens sometimes it doesn't.
It mainly happens on Arcade, not so much Rising.
I have one other person on my list who plays but he is from the forum for it on here.

He has other special actions on the Triangle button since he only has one weapon slot as well. He can do a Moonsault. He can do a slide too that has i-frames. And he can throw bombs.

If you're co oping Rising Mode it's fine since Rising Mode is pretty easy and I haven't had any problems in Rising. It's mainly the Arcade Mode that has the issues online.

Yeah if me and my partner have to use a Continue and if the game freezes on the Continue it will freeze my whole PS3 and I gotta repower.
I use Bahamut and Leviathan.

Stage 1-4 are a breeze to learn, the last 5 start to pick up in difficulty. And the last 2 are a real pain in the ass.

I just remembered the one I forgot was Super Tackle. Tried to edit my last post but it wouldn't let me.
Super tackle is for breakable obstacles in your way that you cant Vault over. Like the sandbags that enemies hide behind or doors that you need to shoot down you can Super Tackle right through them. Useful thing about it is when enemies are hiding behind sandbags and things you can supertackle the rubble from your tackle destroying it will kill all the enemies behind it.
You can also super tackle the fuel tanks that you can blow up.

the circle button is the Action button it does different things depending on the situation and it's the same for all characters.
If you're standing still it does the deflect,
If you're running and are running towards a crate or obstacle it will Vault over it.
If you're running and a projectile is coming at you you'll dodge under it (only certain projectiles)
If you're running and an enemy is in front of you you'll do an Ambush Shot which will make you kinda sidestep through him and let you shoot one bullet while you're doing it.
I think i might have missed one but you get the idea.

In Arcade mode the characters have all the actions already, but in Rising mode you have to purchase them first.
Then the special DLC characters like Sayuri and Leviathan that dont have weapon slots have special attacks on their Triangle like you found out for her.

I Dont know about Sayura as I dont have her. Only DLC char i bought was Leviathan.
As for trophies you can expect a difficulty as hard as NGS2 for this genre. The only trophies that are decent to get are the Bronzes... everything else gonna drive you crazy xD

Also the online multiplayer is glitchy making the co op trophy hard to get. The game can freeze your PS3 on a Continue retry. And sometimes disconnects you both for no reason. The disconnect is rare but the freeze on Continue retry is pretty common.