If $60 is too much, buy Sniper Elite 4 on sale for $9.99. It is mechanically almost identical to SE5 but slightly older. It runs on a toaster and is often bundled for free.
Sniper Elite 5 launched with Denuvo, a highly sophisticated anti-tamper software. Cracking Denuvo is not like cracking a CD key from 2005. It requires months of work by dedicated groups (like EMPRESS or CPY). Sniper Elite 5 Pc Download Ocean Of Games
These authorized key sellers often bundle Sniper Elite games. For example, you might get Sniper Elite 3, 4, and 5 together for $20. If $60 is too much, buy Sniper Elite 4 on sale for $9