With the dearth of First Person Shooters available on the market Heavy Bullets provides a fresh example that you don't need overly complex systems in place to be fun. In a move completely opposite to Borderlands billions of guns, Heavy Bullets has one, your trusty 6 shot revolver. Each time you fire a shot, you must then recover that bullet in order to be able to reload it and fire it again unless you are carrying more than just the 6 bullets your start each run with. This creates some interesting situations where you'll be aiming across the room and weighing up whether you're confident of hitting your target; missing may mean having to run across the room with no way of attacking enemies.
Heavy Bullets features an ever familiar roguelike formula of randomized dungeons as you work your way through 8 levels with increasing varied enemies; at the end of levels 4 and 8 you will fight a fixed boss. Each enemy requires a different strategy in order to tackle them effectively but all drop when hit with one bullet to their weak spot (The only exceptions being the bosses and one enemy). Enemies are varied enough but if you take a methodical pace you can deal with them fairly easily, as long as you're accurate with your shots. I would personally recommend using keyboard and mouse for this game, I tried using a wired Xbox 360 controller but could never find a setting I was truly happy with.
In addition to your gun there are a number of items in the world to help (or sometimes hinder) your progress. Each play through I'd race for a backpack which allows you to store an additional item as well as the one you have equipped, The only thing that is persistent between playthroughs is a bank balance which you can use to save money for purchasing items and upgrades, the bank can also be used to store an item for future playthroughs and purchasing discounts, life insurance and a last will. If you die with the last will in your possession all money on your person is deposited to the bank.
The duration of a playthrough will depend a lot on your play style; I tended to edge around corners slowly picking off enemies one by one and found playthroughs to be between 40 minutes and an hour but it is possible to complete a run in less than 10 minutes (according to the leaderboards!). The reward for dispatching the final boss is a fresh $5000 in your bank, Whilst I mention the bosses, I felt the final boss was a bit two easy once you figure out how to take him out and would clear the room of other enemies before finishing it off. The level 4 boss was a bit more tricky, but eventually you develop the skill to take it out with relatively little damage received.
Overall, Heavy Bullets feels like a fresh take on a huge genre and felt very different to what one would expect of a FPS. It's psychedelic colour scheme and upbeat music make it feel like a strange trip and aside from minor disappointment with the boss encounters its up there in terms of a single player FPS/roguelike experience.