ah yes ok that sounds familiar. one thing that I recall (maybe incorrectly ) about battletech is it had a much larger pilot component than MechWarrior, that is there was a lot of roleplay around getting out of the mech but it doesn't look like the game will focus on that.
Standard BattleTech is about 'Mechs. The only thing pilots have are Gunnery and Piloting skills, and optionally name and experience (improve skills after game).
MechWarrior roleplaying game, now A Time of War, is, well, roleplaying game, though 'Mech combat is executed under standard BT rules.
Optional rules include more stuff for pilots even outside RPG play, along with all sort of other stuff.
Not familiar with the details, I know the basics.
Is there a sniper rifle equivalent? One big missile? Area of effect stuff?
Since 'Mechs have multiple weapons, contrasting them to specific weapons is not really accurate. Individual 'Mechs types under default configurations are can take certain roles though. For example, the Marauder is basically a sniper with trio of long-range weapons and poor/mediocre armor for its weight class (and depending on your standards).
Under simple tech level BattleTech video game starts under, the longest range weapon is autocannon/2, which deals abysmal damage. Followed my LRMs (fired in 5/10/15/20 at a time depending rack size) and then AC/5 and particle projection cannon (particle beam, basically a lightning bolt). With advanced tech, the Gauss rifle and extended range PPC are the "sniper" weapons, but not sure if either one will be in the game.
No big missiles until experimental advanced technology, the mentioned Arrow IV artillery missile aside. Unlikely such things can be found in BattleTech due to in-universe date which is about 3025 probably.
Short range missiles are bigger than LRMs and deal more damage per missile with shorter range.
That would explain it, but thought that the SLDF had a green color on their stuff.
Star League Defense Force color was standard olive drab for sure, but individual regiments may have earned right for decoration or whatever else. Since the PC game is not canon per se, the intro video can be assume to be interpretation. Olive drab sure looks boring for the largest, most powerful military ever. Not very high-tech either.
Today's video has LRMs, SRMs, Autocannons, PPCs, Lasers and melee.
What's missing? Flamers, Machineguns and pulse lasers? They're probably in there.
Pulse lasers are advanced tech.
Assuming 3025-tech level, the weapons and equipment in the game should be:
Standard structure, standard armor, standard engine (and gyro), single (standard) heat sinks, jump jets.
AC/2/5/10/20
Small, medium, large laser
PPC
LRM-5/10/15/20
SRM-2/4/6 (maybe inferno ammo option)
Flamer
Machine gun
Melee (kicks, punches, charge, death from above). Unlikely to be in-game but hatchet exists under standard BT rules as a melee weapon, and clubs can be picked up from blown off limbs or trees.
EDIT Theoretically, some experimental equipment may exists during this timeframe in the game:
Electronic Warfare Equipment
Binary (Blazer) laser
...
And that's about it.