DOOM (2016) did something few reboots manage: it looked at forty years of shooter design trends, mostly regenerating cover and slow tactical pacing, and rejected almost all of it. The result is a game that still feels distinct nearly a decade later.
Speed is the whole point
There is no cover system. Standing still is the losing move, since health and ammo mostly come from finishing enemies off in brutal melee executions (Glory Kills) that reward staying in the fight rather than retreating from it. The result is combat that plays more like a puzzle in motion: which demon do you execute first to refill health, which weapon clears the next wave, where do you need to be in the next two seconds. It rewards aggression in a way almost nothing else in the genre does.
The Doom Marine has no arc, and that is deliberate
There is a story, told mostly through logs and environmental detail on Mars and in Hell itself, but the protagonist has no dialogue and no character development. He is furious that demons exist and intends to end that situation. The game trusts that this is enough, and it is, since the pacing never slows down long enough to need more.
Where it sits in the series
DOOM (2016) is the reboot. DOOM Eternal followed it with faster movement, a bigger arsenal and a much more elaborate combat loop, then extended that further with story DLC like The Ancient Gods Part Two, which continues directly from Eternal's ending and escalates the demon-slaying combat further. Starting with 2016 is still the right entry point, everything after builds on the systems it establishes.
Get it in Singapore
The original DOOM (2016) Steam digital code is region-free and works on any Steam account worldwide, including Singapore, with instant delivery after purchase. If you have already finished it and want to continue the story further into Eternal, The Ancient Gods Part Two is available as an Xbox digital key.