Can I play this game without steam

[shrode]

if I purchased the game through steam?

For example, if I buy a laptop, could i download the other game client (non-steam) and play on my regular account?

[lamster]

No (except for some very old legacy accounts).

Steam uses their own authentication system so if you buy Steam-Altitude the only way to play is from Steam.

You could download Steam on your laptop and play from there.