Until Monday, September 5th at 11:59 p.m. EDT, GOG and new publisher Digital Games Factory are offering these (formerly Kalypso-published) strategy titles at a 50% discount. This isn't a bundle deal, so whether you want the whole pack or just one game, you'll benefit from the discount.
[Promo Page]
Commandos Ammo Pack $2.99 [includes Commandos: Behind Enemy Lines & Commandos: Beyond the Call of Duty]
Commandos 2+3 $4.99
Praetorians $2.99
Imperial Glory $2.99
Constructor $2.99
Mob Rule $2.99
Mobygames:
Commandos: Behind Enemy Lines (87)
Commandos: Beyond the Call of Duty (81)
Commandos 2: Men of Courage (89)
Commandos 3: Destination Berlin (79)
Praetorians (78)
Imperial Glory (72)
Constructor (84)
Mob Rule (75)
Demos:
Commandos: Behind Enemy Lines
Commandos: Beyond the Call of Duty
Commandos 3: Destination Berlin
Praetorians
Imperial Glory
Mob Rule
Constructor