Way more tedious & frustrating than the first. I don't mind a little challenge, but it quickly unnecessarily becomes less fun & more rage inducing without checkpoints.
Some areas were unbalanced far as enemies go. Not impossible, but more difficult than necessary.
Most importantly right now, this game could make great use of a checkpoint system. Clear out zombies, or objectives, whatever, down to final portion of whatever. Die. Start over from beginning of mission.
Recon area? Checkpoint after checking every spot. Capture tower/factory? Checkpoint. Kill a boss? Checkpoint. Come on now.
Charming short game. Easy & fast. It did not recognize that I had finished the game, twice, so I had to submit a report. Aside from that its worth the playthrough, just be ready to submit bug report if does not recognize completion...
When I first tried playing this it bugged & didn't save cash. SO I chilled out but eventually it started working right & saving the earnings, & it picked up the being fun, but was boring again by the time the 3mil ach was got. Coll until then though, minus that bug.