One of my favorite  games ever became abandonware a long time ago. It's name is Fusion Genesis, an Xbox 360 arcade game. It was only ten dollars but I had hours upon hours of fun playing it. The game play was a twin stick shooter rpg spaceship combat game with a top down view. It was always online though and had no physical copy. There was pvp and pve with missions and I guess the equivalent of dungeons. You could buy upgrades and weapons for your ship and even get new larger ships. There was an endgame gauntlet you could run for some seriously good loot and upgrades. You could join factions and do missions for them so they would offer you the ships exclusive to them. My favorite faction was the Dominion. They had rugged military style ships with weaker shields than the others but super strong hull armor. I had gotten so strong at some point I could not lose in pvp. I simply had to much hp and could tank any players dps while chunking them down with my turrets. Ah the nostalgia is powerful for that game I miss it dearly. Wish I could still play it.