No revenue estimate for PSN — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $966 — a different platform, not this one.

Grieve

Grieve is a singleplayer thirdperson action shooter, with various levels and tasks. Part of the main objective is to collect intel and save hostages in secured locations where you must bust into and clear all the enemies if necessary. You will be provided with guns, on most missions but you can loot for extra items if you would like to survive. You will be radioed by a friend on entry to a location to remind you of the basic and obvious things you need to be aware of in order to survive.